Yesterday I got into see a vet and my perception that Moggie is not growing, is loosing weight and is underweight were confirmed. At 12 weeks he was 3 and 3/4 lbs, at 16 weeks he was 5.5 lbs, he will be 7 months old Sept 12th, and he is now 6.3 lbs, which is probably down from 7 or 7.2 two or 3 weeks ago.
But other than that, so far anyways, he seems healthy. Occasional regurgitation is a non issue. He tested negative for feline leukemia which, if he had it, he would have been born with, as he was never outside at all before being vaccinated and it is not common in this area anyways, and he also tested negative for FIV, which has never been seen in this area, but as he came from a different community he was tested for it. I am really relieved neither of these is a factor!. As he does not seem generally ill the vet doubts it is FIP. He has been treated for parasites monthly, with Revolution, so most parasites except for tapeworm should not be a problem, except when he was 12 weeks old, he was given the Milbemax which would treat tape worms, and I was not given or told about the next pill that was supposed to be given to him 2 weeks later, making the treatment ineffective. (there is more than 1 vet working out of the same office who apparently share patients, and when I decided to exchange the Profender for Milbemax, things got confused) But supposedly tapeworms that are not obvious don't usually cause a kitten to stop growing or loose weight. And the common stuff that does, like irritable bowel is usually accompanied by diarrhea, which he does not have. Today he is pretty lethargic after the Profender but not usually... And today I saw a healthy looking poop and no diarrhea or visible worms coming out. And as long as he has been recently seen enthusiastically eating mice, he has a healthy apatite.
So it is a bit of a mystery what is going on. The vet is thinking maybe he just has genes that mean he is going to be a really small cat (cats I saw at the house he came from were the biggest cats I have seen in my life) combined with a parasite (or my crappy scale) caused his weight loss which is now treated with Profender. He will be weighed again in a couple weeks and if he looks to still have a problem we will take it from there. And now I know my scale is often more or less accurate I can keep watch for any alarming trends before that.
Also, it was really helpful getting to talk to a vet who also has an indoor outdoor cat that is an avid hunter, who sees the parasites they get from this as a problem that is normally manageable (meaning only in this specific area and environment- other areas may be totally different). Especially as the first mice to go mysteriously missing without a trace, were the ones living and pooping inside my house, before my kitten ever set foot out the door.
But if anyone can think of anything besides the parasites which Profender should take care of, that could cause the symptoms described, I would greatly appreciate hearing about it. I am still really concerned... And puzzled.