My friend belongs to the Society, not her Singer! Just reread my post and realized it sounded like the dog did, lol. He's a smart boy, but not up for signing anything legal - yet…
IM so sorry for your loss … it almost sounds like feline leukemia or feline aids... we had 2 litter mates die from it... And the symtoms you describe sound all to familar ... You might contact your vet and ask questions... If you have other cats, this is a highly contagious desease.