Well the huge vet bill is a reassurance that at least you tried. You would feel bad forever if you had not. I have outlived several. My daughter is only 23, and she outlived 2 fine animals. (They were old when they came into her life.) One was a tiny, ancient shetland pony that we bought for $300 when my daughter was 4 years old. She had so much fun with that pony! She rode her, braided her hair, washed, combed, dressed her in clothes, and basically used her for a barbie doll. That pony was worth her weight in gold. It was so sad to lose her, but so nice that she was in our lives.