Our 13wk old puppy had his DHLPP vaccine on Friday. He was pretty normal Friday. Saturday we traveled 2 hours away, and he slept the whole time, and the whole day/night. He had diarrhea all day, but did wake up to eat and go potty. We returned home today, and even after being back with our other dog he is still pretty lethargic/sleepy. It almost looked like it was hard for him to get up, but we brought out a favorite motorized rabbit toy and he got up and went after that just fine, like normal. He played for like 10min, more slowly but still played. So can it be normal to still be so sleepy after the vaccine 2 days later? Maybe he was also stressed from traveling? I will definitely call the vet when they open tomorrow...but I'm just worried as in the 2.5 weeks we've had him, he's never slept this much or left our adult dog alone this much!