Wow, I forgot Cooper was still that young. That's heartbreaking.
Like Mikko, Moose-dog was old and I knew his time was coming. Bat-dog had been fine but on a Thursday, she suddenly had a small seizure like episode. Took her to the vet right then and she gave her some anti-seizure meds for the weekend. By Sunday, Bat-dog couldn't even stand up anymore and the episodes were worse and every hour or two even with the meds. I took them both in that evening together to let go. Aunt C, Moose-dog's favorite person in the whole world came with us. I told Moose-dog to shout out the warning "Bat-dog's coming right behind me!" when he crossed to prepare everyone. She was an acquired taste but she loved me and Moose-dog completely.
Cat-dog takes her role as caretaker very seriously. Sometimes a bit too seriously... She didn't approve of him playing with a friend's dog the other day - barked once at Tornado-dog and he ignored the other dog completely.