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What were the changes in them that you noticed?

They were depressed looking. My dog was listless and wouldn't play with his ball or catch his stick. His eyes were so sad. He would lie on the spot where I buried her. I eventually got another companion for him and he did a complete turn around.
My cat wouldn't eat for 3 days, and she would restlessly walk around the house giving out a soul wrenching miaow. Intense hunger I think drove her to the food bowl. I never replaced my Dutchess simply because I couldn't bear going through that again.

I understand that and no I have no plans to get another.