Ok - I'm gonna look at it from the other way of what other people have said but remember - I am THE worrier of all worriers. I just re-read your intro so little Marco is now about 10 - 11 weeks old? The fact that some of his usual puppy playfullnes and other behaviors have changed - I probably would be tempted to call the vet.
When I got Shiloh (about 8 weks old), we stopped at my cousin's on the way home to show him off. As we were leaving, Shiloh wiggled out of my arms and fell onto the gravel driveway - needless to say- I was really scared. The rest of the day I watched him really close - lookin/watching for ANY changes but there never were any. Shiloh kept eating - drinking - pottying - playing - no changes. That is why I never did call the vet. On the other hand, you aare noticing some minor changes in Marco. Definitely if he is not eating his usual meals or going potty like he did then I would at least call the vet.
When I got Shiloh (about 8 weks old), we stopped at my cousin's on the way home to show him off. As we were leaving, Shiloh wiggled out of my arms and fell onto the gravel driveway - needless to say- I was really scared. The rest of the day I watched him really close - lookin/watching for ANY changes but there never were any. Shiloh kept eating - drinking - pottying - playing - no changes. That is why I never did call the vet. On the other hand, you aare noticing some minor changes in Marco. Definitely if he is not eating his usual meals or going potty like he did then I would at least call the vet.