Carol all that information is so helpful, thank you so much, my vet pretty much echoed a lot of what you've said.
And I remember you sharing your experience with me before Allison, hearing these experiences really helps. So, so sad that you lost Tiger to FIP.
I'm trying not to let worrying take over and am concentrating on the fact that the odds are in our favour and both my boys are really healthy now.
I think most of you have seen my update on the boys thread but just in case you haven't, here it is:
He was actually very reassuring. Talked through the options of repeated testing but explained that when it comes to the virus mutating, it's pretty much a case of wait and see.
He stressed that in 95% of cats it doesn't mutate and that we can do as much testing as I want including bloods, but if it was his kitten, he would watch for any clinical signs but other than that, try to put it out of his mind because Chester will probably be fine and if he isn't, all the knowledge in the world wouldn't change the outcome.
He said it's a worry that will never leave, but the odds are fully on Chesters side.
I asked if there was a point where fip stopped being a possibility and he said it's a lifelong possibility but less & less likely as he gets older.
He also said that the chances are that 1 of my other 3 boys had it & we just never knew. It's that common.
Unfortunately, it's highly likely that Beau has been infected too. But, he's had no symptoms so he thinks his immune system has been stronger.
He was impressed by Chesters progress & said that every bit of growing he does is a good sign.
I spoke to him about neutering & vaccinations on the basis of helpful advice on here (thank you) and he agreed that waiting as long as possible with both of them is the best plan.
He doesn't neuter before 9 months anyway as he says it can affect bone growth if done earlier.
Also discussed the parasite - cryptosporidia. Apparently treatment for it is still basically in trial stages with human drugs.
He had called 2 specialists and they recommended azithromycin. It's a human drug but it has some nasty side effects. It's recommended in cats showing symptoms - which neither of them are - otherwise there's a chance they have got rid of it themselves.
His worry is that even though the diarrhoea has stopped, it can lie dormant. But having looked into it and having taken the drug myself with horrible side effects, I've decided not to use it. My vet said it's a very logical decision, although he would have veered on the side of caution and treated them just in case.
Now I just need to hope that they keep growing and thriving the way they are currently!