Q. Belgian Malinois/ German Shepard mix 16 weeks old, been vaccinated, second set of done a week ago. Today lethargic, not eating, sleepy. Any suggestion
A. This would be a bit late for a vaccination reaction. He may have picked up an infection of some kind, might have eaten something that didn't agree with him, swallowed something he shouldn't have, such as a part of a toy, that is now causing an obstruction, there are a number of possibilities. I recommend getting him seen by your vet if the symptoms don't resolve or get worse before tomorrow. If you can, take his temperature, normal should be 100-102F. Higher than that indicates infection or inflammation somewhere and he should be seen by your vet as soon as possible.