re: When do you know it’s time to put a pet down?

If you make the decision to put him to sleep, the guilt will consume you. I still feel guilty today. But you will do the right thing. Give him all the love and extra attention that you can and afterwards (it will take a long time), you will overcome the guilt and know that you did the right thing in the eyes of God. I feel for you. And I am praying for you, your family and your pup. Don't worry, you will see him again. God will make sure of that.