I wish we would have taken my cat into the vet to get looked at before he passed. He would squat like he was going to poop, but never did, and did that quite often. Then he disappeared for a while and my parents found him around the side of the house lying under something, dead. I liked that cat. We've never had a tamer cat since.
We had possibly the worst way our dog could die happen... She got hung, sort of. We had just taken her to the vet and back, and we had to strap her in the bed of the truck or else she would jump out since she didn't like riding in the truck. Well, we forgot to get her out when we got home, and she decided to jump over the side with the leash still on... Of course, when my dad finds out, it's all my fault since I should have been more responsible and gotten the dog out of the truck...then he later goes on to say he wasn't blaming anyone...alrighty then...
I know how it is to lose a loved pet and then even get blamed for it...