Category Archives: Dogs

Caring for your Dog, Dogs, general, Skin diseases of Dogs, Today's News

Ear Infections

How common are ear infections in dogs?

Infection of the external ear canal is very common in dogs especially those with allergies or who have long or hairy ear canals like Cocker Spaniels, Miniature Poodles, Golden Retrievers or Old English Sheepdogs.

How do I know that my dog has an ear infection?

Dogs with ear infections flap and scratch their ears. The inside of the ear flap is red, inflamed and smelly. A black or yellowish discharge often develops.

Yeasts are the cause of most ear infections. They affect swimmers and those with long, narrow or hair filled ears that stay moist. Dogs with allergies to food or pollen also have warm, moist, inflamed ears that favour repeated infection.

When chronic ear infections are inadequately treated, more resistant bacteria can survive in the ear and are difficult to clear.

What about ear mites?

Ear mites cause a black discharge, scratching, and head shaking. They usually affect puppies or in contact adult dogs.

Can’t I just collect some medication?

There are several kinds of bacteria and at least one type of yeast that cause ear infections. Without knowing the kind of infection present, we do not know which medication to use.

Foreign bodies, like grass seeds, and tumours in the ear canal cause irritated ears, too. Treatment with medication alone will not resolve these problems.

The dog must also be examined to be sure that the eardrum is intact. Some medications result in loss of hearing if the eardrum is ruptured.

We examine a sample of the material from the ear canal under a microscope (cytology) to find which organism is the cause of the infection.

How are ear infections treated?

If there is a foreign body in the ear canal, we sedate the dog and remove it.

If there is a heavy build-up of debris we anæsthetise the dog and clean the canal.

We choose ear drops based on the type of organism we see in the discharge from the ear.

Caring for your Dog, Diseases of dogs, Dogs, Skin diseases of Dogs

Flea control

Control fleas ON the dog:

  • Capstar or Comfortis tablets kill fleas and paralyse flea mouthparts preventing deposition of saliva.
  • Monthly applications of Advantage, Advocate, Advantix, Frontline, Revolution, or Comfortis throughout the year keep flea numbers as low as possible.
  • Flea powders, sprays, and shampoos kill the fleas present on your dog at the time of application but have little residual effect.

Control fleas IN the dog’s environment:

  • Professional fumigation of the house and yard will control egg, larval and pupal stages of the flea life cycle most effectively.
  • If you spray or flea bomb yourself repeat the application in 3-4 weeks to catch the next hatching of pupae.
  • Some products also contain growth regulators that prevent flea maturation.
  • Wash bedding in hot water and dry in the sun.
  • Vacuum carpets and furniture often.
  • Rake up leaves in shady places and provide outside kennels or hidey holes off the ground.
  • Flea larvae love dust so provide working dogs with concrete runs.

Do not be too quick to blame kennels for fleas on your dog. When your pets are gone pupae remain in their cocoon because the house is quiet and empty. When they return the vibrations, heat and light stimulate the emergence of adult fleas. They jump on dogs, cats, and even people looking for a blood meal.

Effective flea control depends on knowing the flea’s life cycle.

Caring for your Dog, Diseases of dogs, Dogs, Skin diseases of Dogs

The flea life cycle

Adult fleas are only 5% of the entire flea population. The eggs they lay on the dog fall off into the dog’s environment. Flea eggs are pearly white and too small to see without magnification. They hatch into larvae in 1 to 10 days depending on how humid and hot it is.

Flea larvae eat organic debris and adult flea faeces. They avoid direct sunlight and burrow into carpet fibres, grass, branches, leaves, or soil.

Dry conditions kill larvae. Outdoor larval development occurs where the ground is shaded and moist and where flea-infested pets spend a significant amount of time. Indoors, larvae survive best in the carpet or in cracks in the floor.

After 5 to 11 days larvae pupate. While in the cocoon pupae are resistant to insecticides and continue to emerge for 3 months despite insecticide application.

Pupae emerge as adult fleas in another 5-10 days if stimulated by the vibration of passing pets, physical pressure, carbon dioxide, or heat.

When the adult flea emerges it moves towards body heat, movement, and exhaled carbon dioxide. Following the first blood meal, female fleas begin egg production within 48 hours and continue for 100 days.

This entire life cycle (adult flea – egg – larva – pupa – adult) takes 7 – 21 days depending on temperature and humidity conditions.

Flea control depends on knowing this life cycle.

Caring for your Dog, Diseases of dogs, Dogs, general, Skin diseases of Dogs

Flea allergy

What is flea allergy?

Some dogs are allergic to fleas and react with non-stop scratching and biting. Normal dogs are only mildly irritated by fleas. The flea allergic dog is allergic to flea saliva. Just one flea bite causes intense and long lasting itchiness.

The dog chews, licks, or scratches over the rump, on the belly and down the legs. This causes hair loss and damage to the skin. Breaks in the skin allow bacteria in and infection to develop.

What is the proper treatment?

We must eliminate all fleas on the dog and in the environment.

Capstar or Comfortis kill the fleas and paralyse flea mouthparts preventing deposition of saliva.

Every month treat your dog with Advantage, Advocate, Advantix, Frontline, Revolution, or Comfortis to keep flea numbers as low as possible.

Fleas spend most of their life cycle off the dog as larvae and pupae in bedding, carpet, dirt and leaves. Wash bedding in hot water and dry in the sun.  Vacuum carpets and furniture often. Rake up leaves in shady places and provide outside kennels or hidey holes off the ground.  Call a professional to fumigate your house.

Flea control depends on knowing the life cycle of fleas.

Cortisone products like prednisolone block the allergic reaction and give relief from the intense itching.

If your dog develops a bacterial infection in the skin, your vet will prescribe antibiotics.

Diseases of dogs, Dogs, general, Skin diseases of Dogs

Sarcoptic mange or scabies

Itchy dog?

Sarcoptic mange causes severe itching.  Dogs chew and scratch their skin constantly.  They lose hair and the skin is thick and red, especially on the ears, legs and belly.

What causes sarcoptic mange?

It is caused by a mite that lives on the skin of any age dog.  It’s also called fox mange. Many dogs catch it from foxes.

Is it contagious?

Sarcoptic mange is highly contagious to other dogs. Humans in close contact with their dog  can catch it, too.  Although the mites are not able to complete their life cycle on humans, they cause a rash and severe itching before they finally die.  Contact your family doctor or pharmacist for advice on treatment.

How is sarcoptic mange diagnosed?

Diagnosis is made by scraping the skin with the side of a scalpel blade and examining it under the microscope.  Despite severe itchiness there are often only a small number of mites present on the dog.  If all skin scrapings are negative and we are still suspicious we do a treatment trial.

How is it treated?

The spot on treatment Revolution applied weekly for 3 weeks is easy and effective.  Sometimes we inject or drench with ivermectin weekly. Ivermectin is not licensed for use in dogs and is dangerous for collie breeds.

All dogs in contact with the affected dog should be treated.

Discard the dog’s bedding before treatment.

If any member of the family develops an itchy skin rash, please tell your doctor that you have been exposed to a dog with sarcoptic mange, also known as scabies.

Diseases of dogs, Dogs, general, Poisoning

Rat bait poisoning

Dogs love the taste of most rat and mouse poisons so keep them well out of reach of pets. Do not allow pets near areas where you have laid rat bait.

Most rat and mouse baits contain a form of warfarin. Warfarin stops the blood clotting. Owners often don’t notice signs of rat bait ingestion for a couple of days.

If you know your pet has consumed a rat bait come straight to the Veterinary Surgery. An emetic will make your pet vomit up the bait and minimise absorption of the poison.

Signs of warfarin poisoning:

  • Pale gums
  • Lethargy or resting more than usual
  • Blood in urine
  • Blood on faeces
  • Blood around teeth and mouth
  • Bruises on belly
  • Difficulty breathing
  • Sore joints, reluctance to walk

A special form of Vitamin K reverses the toxic effects of rat bait. Because we are never sure how much poison your pet has consumed it is difficult to know how much Vitamin K should be given and for how long. We will ask you to watch for signs that more is needed.

After the Vitamin K is finished return to the Surgery for a blood test to check that the blood’s clotting ability is back to normal.

Diseases of dogs, Dogs, general, Internal diseases of Dogs

Pyometra or infections of the uterus

What is pyometra?

Pyometra is an accumulation of pus in the uterus. Toxic products form and make the bitch very sick.

How do I know if my dog has pyometra?

If the cervix is open pus drains from the vagina and can be seen on the skin or hair under the tail or on bedding and furniture.

If the cervix is closed, the trapped pus distends the uterus and abdomen. The bacteria in the pus release toxins into the circulation.  The dog goes off her food, vomits or passes diarrhoea, drinks a lot of water and becomes very depressed.

How is it treated?

Pyometra is an emergency. Surgery to remove the uterus and ovaries ensures complete recovery. If not treated toxins cause organ damage. If the cervix is closed the uterus may rupture and spill into the abdominal cavity. Either of these is rapidly fatal.  Intravenous fluids and antibiotics before and after surgery reverse the toxicity and control residual infection.

When does it occur?

Pyometra is most common in older bitches after many years of oestrus cycles without pregnancy.  Occasionally younger bitches are affected.

Pyometra occurs about 1-2 months after oestrus.

How is it diagnosed?

A non-desexed female dog that is very ill , drinking a lot of water, and has a vaginal discharge or an enlarged abdomen could have pyometra. They also have a high white blood cell count and serum globulin level. Toxins reduce the ability of the kidneys to concentrate the urine.

An ultrasound examination identifies an enlarged uterus and differentiates pyometra from pregnancy.

Why does my dog have pyometra?

Hormonal changes cause pyometra. After a bitch is on heat or in season (oestrus), progesterone levels stay high for 8-10 weeks, thickening the lining of the uterus in preparation for pregnancy. If pregnancy does not occur for several oestrus cycles, the lining continues to thicken and cysts form in it. The thickened, cystic lining secretes fluid creating an ideal environment for bacterial growth. High progesterone levels also inhibit contraction of uterine muscles preventing expulsion of the fluid.

Drugs containing progesterone and/or oestrogen also predispose bitches to pyometra.

How do bacteria get into the uterus?

The cervix is the gateway to the uterus. It remains tightly closed except during oestrus. When the cervix is open during oestrus vaginal bacteria can enter the uterus easily. If the uterus is normal, bacteria won’t survive.  However, when the uterine wall is thickened and weak, conditions are perfect for bacterial growth.

Diseases of dogs, Dogs, Internal diseases of Dogs

Pancreatitis

Fatty foods like sausages, cheese and the cat’s biscuits, cause acute pancreatitis in overweight middle-aged dogs.

Dogs with acute pancreatitis vomit, refuse their food, withdraw from the family and show signs of pain in the belly.  They hunch over, adopt a praying position, or are reluctant to move.

To treat pancreatitis we ban all food  and give intravenous fluids, antibiotics, anti-inflammatory drugs and pain relief. The pancreas produces enzymes that digest food, and hormones like insulin that help the body utilise glucose.

Under normal conditions, digestive enzymes produced by the pancreas are activated when they reach the small intestines. In pancreatitis, these enzymes are activated prematurely and digest the pancreas itself. The severity of the disease depends on the quantity of enzymes activated.

Some cases of pancreatitis are in reaction to particular medications or toxins.

Inflammation of the pancreas sometimes allows digestive enzymes to spill into the abdominal cavity resulting in damage to surrounding organs, such as the liver, bile ducts, gall bladder, and intestines.  Toxins spilling into the bloodstream cause shock and problems in more distant organs.

If we suspect pancreatitis we check the level of pancreatic enzymes in the blood. Some dogs with pancreatitis have normal enzyme levels. If we still suspect pancreatitis we run a pancreatic specific lipase test.

Recovery depends on the extent of the disease and the response to initial therapy. Dogs that present with shock and depression have a very guarded prognosis. Most of the mild forms of pancreatitis respond quickly to treatment and have a good outlook.

Most dogs recover with no long-term ill-effects. However, there are three possible long-term complications of severe or repeated pancreatitis.

  1. If a significant number of cells that produce digestive enzymes are destroyed, proper food digestion is compromised. The dog loses weight despite a ravenous appetite and produces voluminous, soft faeces.  This is known as pancreatic insufficiency and is treated with by adding the missing enzymes to the food.
  2. If the cells that produce insulin are destroyed diabetes mellitus can result.  Signs of diabetes include weight loss despite a good appetite coupled with excessive drinking and urination.  Insulin therapy may be necessary.
  3. In rare cases, adhesions between the abdominal organs cause momentary “catches” as your dog moves are a consequence of pancreatitis.
  4. After a bout of pancreatitis, dogs are prone to relapse and owners must make sure that their dog has no access to fatty foods. We recommend a low fat good quality dog food.
Caring for your Dog, Dogs, general

Dogs are good for you!

The doctors and scientists have confirmed what pet owners have known for centuries – dogs are good for you!

Pet ownership increases physical activity and reduces obesity, but also reduces stress and builds community.

Owning and walking a dog significantly increases the amount of walking a person does. Young girls who own a dog spend 29 minutes more per day in physical activity than their friends without a dog.

Scientists proved some years ago that obese people who diet and exercise with their obese dogs are much more likely to lose weight and keep it off than people who diet and exercise alone.

Recent studies of school age children have shown that just incidental play and interaction with the dog were enough to prevent obesity.

Children of dog-owning families were in better physical condition even if they did not personally walk the dog.

Dogs owners report that their dogs are a strong source of motivation, companionship and social support – that is great mates!

Dogs have social benefits and build community networks because owners interact with other people on walks and at dog related activities like obedience classes.