So what would the symptoms be for FIP? My cat's vets never tested both of my cats for it. One of them (Sky's vet) told me that it was up to me but most test are really not conclusive because the test doesn't always prove something is wrong when it comes out positive. I therefore didn't test Sky for it but she does seem fine. She was only tested for Fel Leuk and FIV. This was also the same with Simba when he was little. They didn't give him the FIP test and has been good for two years.
As with the early spay/neuter, I have seen faster recoveries from younger animals than from older (over 5 months). The shelter has had kittens fixed at an early age and when I saw how fast the females recovered I thought the same was going to be for my 6 month old kitty. She fully recovered from the surgery two weeks afterward. She was also sick with a respiratory infection which she came in with. I do know that they hardly, if ever, treat them for it. They rather euthanize them which to me is a sad thing.