I took the dogs for a bordatella vaccine this morning since I'm boarding them in a couple of weeks. They gave them the vaccine that's injected into the nose. Brutus came home and seemed fine. Zero ate his breakfast, then passed out in his crate. That was about 9 am. He's still asleep. I tried to rouse him a while ago to see if he needed to go outside. He woke up only after I started petting him and left the crate only after I coaxed him to do so. I opened the door to see if he needed to go out and he walked right back into his crate. 30 seconds later he was unconscious again. The vet is closed until Monday and they didn't tell me about any side effects. Is this normal?