I wouldn't have a snap test done on any cat due to high risk of a false positive, it is a waste of money and especially on such a young kitten. I would keep them separate till you have a more accurate result before considering rehoming.
I find it odd that his wee doesn't smell - i have fostered two adults with undescended testicles and it was obvious they were unneutered when they had a wee, although a vet had scanned the first one and said he had been done!
Not sure if it is a purpose in life but my aim is to help as many cats as i can, whether that is by fostering or fundraising/donating to cat charities. If i had more money another aim would be to help more oldies
I'm sorry to hear this. I have had an amputation done on an 11 year old and was amazed how well She coped. The main thing you need to know is whether this would cure her cancer and whether it has spread, or if there was some arthritis that would cause issues - if the first, yes, if the second, no.