All posts in Dogs

Heartworm and your dog

How is heartworm spread? How would my dog get it?

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Heartworm is a parasite that is usually specific to dogs, but on rare occasions cats have become infected (a cat is considered a resistant host of heartworms because the worms do not thrive as well inside a cat’s body).  Heartworm is spread though mosquitoes. If a mosquito bites an infected dog and ingests microfilariae (the immature form of the heartworm), the mosquito becomes infected. The infected mosquito can then bite another dog, and the microfilariae pass through the tissue into the blood stream (this is the point of action of preventative heartworm medications-it kills the tissue state of microfilariae before they enter the blood stream). Once the microfilariae enter the blood stream they grow in the blood vessels of the lungs, then migrate to the heart and other vessels causing heart disease.

Heartworm here in Edmonton

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Luckily for us, here in Edmonton (a cooler part of Canada) heartworm is not a major concern. The development of the microfilariae in the mosquito is temperature dependent, requiring about two weeks of temperature at or above 27°C. Below a temperature of 14°C, development and transmission of heartworm cannot occur in the mosquito. Since we rarely see 14 consecutive days of a temperatures consistently above 27°C and it will commonly drop to 14°C overnight over the summer months heartworm is a rare occurrence here in Edmonton.

Does my dog need heartworm prevention medications?

We recommend that your pet be on heartworm preventatives if you plan to travel to southern Canada (especially south BC or Ontario), to the USA or to anywhere else where heartworm is endemic and preventatives are recommended. Pets that remain in Edmonton year round are not at risk and do not need preventative medications.

If you do plan to travel where heartworm is a concern, treatment should be started 30 days after your pet’s initial exposure to the heartworm area and continued  monthly until 30 days after they are not exposed anymore.  For example, a short trip to a heartworm area would require 2 doses of medication. If you arrived in the area on June 15th and only stayed 1 week (returned to Edmonton June 22nd), your pet’s first dose would be given July 15th. 30 days after your return is July 22, which is after the initial dose on July 15th, so you will need to give a second dose on August 15th. Longer trips will be prescribed for accordingly: monthly treatments, continued until 30 days after exposure to the area is complete.

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Heartworm prevention medications are available as either a chewable tablet or a topical broad spectrum dewormer.

When is heartworm testing recommended?

  • If your dog has never been to a heartworm area before and this is your first trip, testing for heartworm as a precautionary measure before starting medication may be recommended by the veterinarian.
  • If you are unsure of your pet’s travel history, testing for heartworm should be done before starting preventative medication.
  • If your pet has traveled to a heartworm before and was not treated with preventative medications on that trip, heartworm testing will be needed before prescribing preventative medications for the next trip.
  • If your pet travels frequently to heartworm areas, but is always on preventative medications testing will be recommended once every 2-3 years as a precautionary measure.

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If a dog is unknowingly positive for heartworm and is started on a preventative medicine, it will not treat the disease. It can actually be harmful to give a dog infected with heartworm the preventative medicine. First of all, heartworm preventatives will not kill the adult heartworms.  Secondly, the preventatives are designed to kill the microfilariae as they migrate through the tissue and not when they are already in the bloodstream. If the microfilariae have already entered the bloodstream the preventive may cause the microfilariae to suddenly die, triggering a shock-like reaction and possibly death of your dog. This is why testing prior to starting these medications are so important.

What if my dog does get heartworms?

It usually takes several years before dogs show clinical signs of infection and unfortunately by the time clinical signs are seen, the disease is usually well advanced and is potentially fatal. The adult heartworms cause disease by clogging the heart and lung blood vessels. This interferes with the action of the heart, causing heart failure. The clogging of the lung vessels reduces the blood supply to the other organs of the body causing them to fail as well. Once your pet is evaluated for the severity of the disease (physical exam, x-rays and laboratory diagnostics) and is deemed stable enough, treatment can be started.

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Treatment is a two-step process, the first step kills the adult worms, the second step kills the microfilariae still circulating in the system. The treatment of the adults usually causes the most severe side effects. If the worms are not already blocking blood vessels in the body, after they die they can lodge in the lung arteries and block even more blood vessels than before the treatment was started. After the adults are killed and start to break down, they also release foreign substances in to the dog’s circulation, causing large amount of inflammation and swelling.

After the side effects from treatment for the adult worms have resolved another medication is given to eliminate the microfilariae still in the system.

After the treatment is completed heartworm testing is done about 4 months later. If the results are negative, preventative medication can be started. If there is still heartworms present a second round diagnostics and treatments will be needed.

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If you are planning to travel to heartworm areas, please call for your prescription first. These medications are by prescription only and your pet’s annual health exam must be current. By calling first we can check if an examination or blood testing needs to be booked prior to dispensing them and gives us time to get the prescription ready for pickup.

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Liver Disease

What is liver disease/chronic liver failure?

Liver disease is caused by damage to the liver. Chronic liver failure is due to long term damage to the liver, causing the liver no longer to work properly. Liver disease is far more common than liver failure, as the liver has the ability to regenerate, even if the initial damage was severe. Liver failure only occurs when more than 70-75% of the liver is irreparably damaged (cirrhosis) and the liver begins to fail as it is no longer able to repair itself.

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Heart Disease and Congestive Heart Failure

What is heart disease and congestive heart failure?

Congestive heart failure occurs as a result of progressive heart disease. Heart disease is when the heart starts to fail in its ability to pump blood properly, but in the early stages the body is still able to compensate and the blood and tissues still receives the oxygen they need. When the heart is unable to pump blood properly though your pet’s body and there is not enough oxygen getting around it causes an increase in pressure and fluid that eventually leaks out of the heart to the lungs, around the lungs or into the abdomen. This causes congestion of the lungs and the heart will begin to fail.

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Chronic Kidney Disease

What is chronic kidney disease?

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Chronic kidney disease is a common health condition in cats and dogs, especially those who are in their senior and geriatric years. The onset of chronic kidney disease is usually slow and the signs are usually generalized and non-specific, usually your pet is “just not doing well”. Some symptoms may also not be noticed until your pet has progressed to a later stage of kidney disease. These symptoms can include, but are not limited to:

  • increased water consumption
  • changes in urination habits (increased, decreased, blood in the urine)
  • weight loss
  • not eating
  • poor hair coat
  • vomiting
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Importance of spaying your pet

Spaying your pet

cat-19106_960_720Spaying removes the ovaries and uterus from your female animal, preventing them from coming into heat, convincing, carrying a  pregnancy and giving birth. This is a surgical procedure performed under general anesthesia by a veterinarian. The recovery time for you pet is about 24-72 hours until they are feeling back to normal, however recovery time for your pet’s body to heal is about 10-14 days. It is during this 2 week recovery period your pet will need to wear an e-collar so not to disturb the surgery site and will need to stay rested and not engage in any activity.

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Cancer diagnosis and your pet

What is cancer

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Cancer is also known as neoplasia. Neoplasia means abnormal/uncontrolled growth of cells or tissues in the body. The growth itself is called a neoplasm, mass or tumor. This mass can either be benign or malignant. Benign cancers do not grow quickly and do not spread throughout the body. Malignant cancers tend to grow very fast, invade the tissues around them and can spread other parts of the body.

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Canine Breed Spotlight: Beagle

Let’s look at the Beagle!

Dog breed group: Hound Dog

Average life span: 12-16 years

History

Dogs that are similar in size and purpose to the modern day Beagle can be traced back to Ancient Greece. The development of the modern breed began in the 19th century in England. There were two lines of Beagles being bred, eventually being absorbed into one bloodline. The name Beagle has an uncertain origin. There are may theories of where the name may have came from. The French words begueule (meaning open throat) or beugler (meaning to bellow), the Old English word beag (meaning small) and the German word begele (meaning to scold) could all be origins of this breed name.

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Temperament

Beagles are happy, gentle and friendly. They don’t tend to be either aggressive or timid, but somewhere in the middle. They are an intelligent breed, but because they were bred to hunt they can be easily distracted by the smells. Early socialization and obedience training (with food rewards!) are the best ways to train your beagle to be well rounded and get them used to many different types of situations.

Is this breed right for you?

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  • They require a lot of exercise, a walk around the block won’t be enough. For this reason they do not do well in apartments, condos or other small living areas.
  • Their coat is easy to care for, however they do shed a lot.
  • They don’t do well left alone for long periods of time. Crate training is important or else they may become destructive when left alone.
  • They can be loud. They will howl and bay when faced with something unfamiliar or upsetting to them.

Health concerns

Both pure-bred and mixed-breed dogs have varying incidences of health problems that may be either influenced by genetics or environmental factors. Here are some health concerns that are more commonly seen in the Beagle.

Epilepsy is common in Beagles, but it is not a health concern specific to the breed. Epilepsy is caused by abnormal electrical activity in the brain causing seizures. This health issue can be controlled with medication and veterinary monitoring.

Cherry Eye can be common in Beagles. This is when the gland in the third eyelid (located in the inside corner of the dog’s eye) comes out of place and bulges. Cherry eye is corrected by a surgery under general anesthetic.

Intervertebral Disc Disease is also common in Beagles. Symptoms can be mild to severe. They might have difficulty walking or appear in pain, or in severe cases they can become be completely paralyzed. The best way to prevent this is to keep your Beagle lean. They are “chow hounds” and love to eat. Over feeding can cause them to become overweight, which can increase their risk of rupturing a disc.

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Rabies Awareness

What is Rabies?

Rabies is a viral disease of mammals (including humans) that is most commonly transmitted though the bite of a rabid animal. In Canada the majority of the rabies cases reported are from foxes, bats and skunks.

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Deafness and your Dog

There are two types of deafness, congenital or deafness brought on by other causes. Congenital deafness is when a puppy is born deaf. Dogs can also go deaf from other causes, the most common being chronic ear infections or injury and old age.

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