Thank you so much everyone for your kind words and thoughts. It is helpful just to have words of people who understand. I appreciate the advice too and will definitely do a workup before spaying the other two.
The vet thinks he might have had a cat virus. He died so fast, within 48 hours and 12 of those were spent not responding.
I have 2 other kittens from the same litter I am terrified of getting spayed now.
I am having the hardest time getting over it. I feel so guilty that I took him in and didn't monitor him well enough after. He was loafing and I thought he was just recovering. I took him in the next day and it was too late. He just looked through me and had seizures until he passed so I hope he...