Expert: Jessica - 9/27/2011

Question
I have a himalayan breeder cat who was infected with FCV, initial illness was about 2 weeks and she was given antibiotics. She was unvaccinated when we got her (breeder only believes in homeopathic vaccines)and because of her illness has not been vaccinated  She recoved completely and this has been about 4 months ago.  We had her tested after 3 months and she is still a carrier.  We would like to breed her but worry about the kittens.  I have seen some literature that says to vaccinate the mom during pregnancy and this will give immunity to the kittens, I have seen an article that says to give the kittens a nasal vaccine at 10 days, and another that says to vaccinate at 4 weeks.
Your thoughts?
Thanks!

Answer
Hi Diane,

Nearly all cats are carriers of calici virus. Considering this is the case, there is no real reason not to breed her. Do your best to minimize all stress and exposure to germs, including additional calici virus, to reduce a flare up when the kittens are in the home. This will not eliminate the chances that the kittens will become infected but should help reduce chances.

Because your cat is a carrier of calici virus, she has mounted antibodies against the virus. These antibodies will be passed to the kittens in colostrum and milk as they nurse. There is a little debate about when to vaccinate, but the major consensus is that vaccinating BEFORE kittens are weaned can actually interfere with the natural immunity they are receiving from mom's milk. Therefore, it's highly recommended to wait until they are at least 6-8 weeks before they receive their first vaccinations. Around 6-8 weeks, natural immunity begins to wear off, as they are eating more solid foods and nursing less.

I don't vaccinate any kittens prior to 8 weeks, and I personally would suggest this schedule for you, but I would encourage you to speak with your vet prior to breeding your girl to establish a plan.

Good luck!

Jessica