Pet Vaccinations: Are they Safe?

Published November 13, 2011

Veterinarian with Cocker Spaniel: Photo via Bruce Fong Blog

Veterinarians are leaning toward individualizing these pet vaccination protocols based on need, age and pet health.

Visits to the veterinarian, dental care and pet vaccinations are central to maintaining our pets' robust health.

But within the past few years, what once was considered to be essential pet vaccination protocols are now being re-examined to determine which annual pet vaccinations are really necessary and to examine the risks of over-vaccinating.

Many veterinarians today are leaning toward individualizing pet vaccination protocols based on need, age and the general health of the animal.

While core vaccines are administered by your veterinarian in order to prevent serious illnesses, canine and feline vaccines also carry the risk of adverse and unintended side effects.

Feline and canine vaccines work by stimulating the pet's immune system to respond to a selected infectious disease. These vaccines provide protection against that particular disease to which the vaccine is targeted. Unvaccinated pets, if exposed to these highly lethal and potentially fatal diseases, are at high risk of contagion, resulting in serious and life-threatening illness.

So what are the risks in vaccinating our pets?

One of the more common dangers is an acute allergic reaction to the vaccine. Anaphylactic reactions can occur shortly after the vaccine is administered. Swellings of the eyelids, difficulty breathing, or muzzle swelling are some of the symptoms.

Additionally vomiting or welts on the skin are other symptoms that demonstrate that the pet is allergic to the product. These allergic reactions can occur even if a pet has never had an adverse reaction previously.

In felines, the rabies and feline-leukemia pet vaccine carries the risk of Vaccine Associated Sarcoma, a particularly aggressive and difficult to treat form of tumor, which may develop in approximately 1-10,000 or 100,000 vaccinated cats. Some estimates are greater, according to some studies, ranging in the area of 2-5 cats in 10,000-100,000 becoming affected.

According to a safer protocol, cats are no longer being "scruff" vaccinated by veterinarians. The injections are now administered in a leg muscle on a specific side, so if tumors develop, surgery to amputate the affected leg may help prolong the life of the cat. In fact, some veterinarians are now administering these vaccines to cats in the tail, as they can manage without it, if amputation becomes necessary.

Other risks for potential side-effects to pet vaccination are yet undocumented or completely understood. Damage to the immune system which may cause damage to major organ systems is one that has been postulated, but remains unproven. However, we must carefully weigh these risks against the danger of our pets contracting serious diseases if not vaccinated.

In consultation with our veterinarian, a balance between under-vaccinating and over-vaccinating may be established.

Depending upon on our pet's lifestyle, whether he or she is an indoor or outdoor pet, what exposure he may have to unvaccinated animals, or especially if she compete in shows, all enter into the pet vaccine protocol equation. It is crucial to establish an individualized vaccine protocol based on the specific needs of our pets in order to lower unnecessary risk.

And while the rabies pet vaccination is mandated throughout the United States on individualized schedules, talk to your veterinarian about some of the safer products available, especially for felines.

What are your thoughts about vaccinations for your pets? Do you vaccinate them on a regular schedule? Leave a comment and share your opinions.

Author's profile photo
Jo Singer

Shortly after retiring as a social worker and psychotherapist, I discovered my "writer's voice"…

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Comments (15)

Anonymous (Unverified)
My cat, who is now 5, developed epilepsy when he was 2 not long after receiving a distemper and rabies booster. I didn't make the connection. Nor did his vet, who continued to vaccinate him annually. He received his 3-year rabies vaccine in December and has been gravely ill ever since. He stopped eating, lost an alarming amount of weight and this once lively, playful cat has become totally lethargic. He has been seeing a holistic vet who recognized this as vaccinossis. He has had every kind of test and has been on every kind of medication and treatment, both traditional and holistic, imaginable. But none of this was really effective, and I am not sure he is going to make it. I wish I would have known about this sooner. Then my once-vibrtant, beautiful cat would not be going through this.
Jinjan89 (Unverified)
I just too my 8 year old cat in for a check up. They recommended vaccinations and she hadn't had any since she was a kitten. They gave her the feline leukemia, distemper and rabies. She'd never had a rabies vaccination before because she's indoor only cat and she's lived most of her life in California. Since I moved to Minnesota, they say it's common for bats to get in the house so they recommend the rabies vacc. She was fine Friday and yesterday up until midnight when I noticed she was lethargic, look dehydrated and was wobbling when she walked like she was drunk. We took her to the emergency pet hospital and she died a few hours later. They're sending her to the University of Minnesota for an autopsy. I'm convinced it was the rabies vaccination. She was a perfectly healthy cat before this. I have three other cats and I will never take them for vaccinations. I'm very sad. I feel like I've lost a loved one.
Anonymous (Unverified)

the only shots we get for our two dogs is rabies...

Anonymous (Unverified)

After her rabies shot killed my cat, I only give my pets their first series and then a 1 year booster. My vet's are fine with this as they know repeated vaccines does not increase immunity. Read Dr. Jean Dodds for more info.

lynda (Unverified)

I just lost my cat after having an autopsy done and they found metastatic pancreatic cancer. He was 14 and just had the rabies and feline vaccination 2 month prior to his death. he apparently was in good health at his check-up. I will always wonder if those vaccinations caused this? The worst part is I was away for 5 days and found him deceased when I came home. No idea he was sick like that except he was acting not quite right after vaccinations but I just thought he had arthritis because he was overweight. I will not vaccinate my next cat if I ever get one.

Amy Lynn (Unverified)
Family cat growing up never had his shots after kitten vaccines... lived to be 20 years old. I had two cats for 14 years and both got ill... both would receive their annual vaccines up until they were 10... one died of kidney failure and the other from pancreatic cancer... I have two cats now and will not get them their vaccines. They are indoor cats... why would they need them? If you think about it, vets are in the business of selling goods, meds and vaccines being included in that. Why would they NOT try to sell you something under the conditions that you "need" them for your pet?
Whitney (Unverified)
My beloved, 14 year old indoor Persian cat had a reaction to 2 vaccines given together in 2000. She never had two shots together again, and she had an antihistamine before any shot, but I limited what vaccines she had. I wish she'd have had nothing further. She had a 3 year rabies shot in 2006. She was due for a booster shot last August & I let the deadline pass. She had a great winter - eating like a champ. After nearly a year away from any vet visits, I took her into a new vet for a check up on February 11, 2010. The vet assured me that they only used the Merial Purevax 1 year vaccine without the adjuvant that had been linked to sarcoma. Apart from sarcoma, I was mainly worried about any immediate reaction, but she did not have one - that day. At the Feb. 11 appt., she had blood work, then a follow up urinalysis on Feb. 28. Everything was normal. Mid-March, she began eating less & putting her ears down slightly. The next week she was losing weight and we could feel her backbone. I raced into the vet & they said she was refusing food because she was upset that we had just moved 10 miles. Absurd. She's lived in many places with us, including Germany. Her bilrubin, which was - as it should be - negative in Feb., was now 25. She was jaundiced. It turned out she had pancreatic cancer that was blocking her bile ducts. She never woke up from surgery. Her name was Reesie G. She was a Tortie & her little tongue stuck out naturally. She was the most wonderful, loving, joyful pet. Like the most faithful dog, she ran to my husband when he came in the house & did rolls of happiness for us on the rug in front of the fireplace. We are devastated. I would do anything to go back to Feb. & not let them give her that vaccine. ReesieG, Mommy loves you. I pray I will be able to see you again in heaven, where I know you are.