Pets bring an endless amount of joy, love and beautiful moments to our lives. However, unfortunately, almost everyone lives less time than we do, and so there comes an inevitable time when we have to say goodbye. Euthanasia is the most humane decision in many cases, especially if your pet is suffering from a serious illness that is causing him a lot of pain. However, many owners are unable to be present at the euthanasia process. So what happens to our pets when we put them to sleep?