Maximus does this..just a drop..when his daddy comes home I have noticed a little drop on the wood floor and also when I took him for a walk the other day I noticed that when I brought him to my mothers house he did the same thing..I asked the vet about it and he said it was because he was TOO excited and suggested that we don't go directly to him when we come home..THAT GOES FOR EVERYONE...but he also said as they get out of their puppy stage it should get better..we'll see