It's always tough when you have to put an animal down. Sorry to hear that.
Don't know if I said this in my other post but my dog is suffering, he can't see good, he has lumps in his ears, but the worst thing is that he's constantly frightened even when my mom and I are in the same room with him. He almost died last year and I think it traumatized him. He got into some poison the pest control guy left out and his kidneys almost shut down, somehow they were able to save him but he hasn't been the same since. I kind of hold a grudge against the careless pest control guy who left the poison out even though he works at the same company as my mom and my mom insists it was an accident and that the guy felt bad. She's constantly saying "Don't hold a grudge against him, it was his first day and he has autistic children at home." but I can't help but hold a grudge, he shortened my dog's life and now I have to go through this painful mess. Sometimes I think i'm like Harold Lauder in The Stand; I can't let go of things, not my first girlfriend who broke up with me 10 years ago, not my dad for abandoning me so he could marry the most evil woman I've ever met, and certainly not my stepmom's kids for taking my dad away from me.
Sorry, I don't mean to ramble, i'm severely sleep deprived and I tend to ramble when i'm in this state.