At a secret lab, lab specimen 19-GB got an unusual injection. Then when he hears he's going to be dissected,he makes a daring escape. After swimming across a river, the injection made him a dog. Luckily for 19-GB, he became the same species of dog the lab sent out to find him,allowing him to blend in with the other dogs.(This is probably why Garfield dislike going to the vet and he said that whenever he sees a test tube,he throws up.)