My dog is pretty well behaved so we don't have much of a problem when we take him. Of course he gets excited when he sees another dog, animal, whatever but no big deal.....he's happy. As far as fleas go, we haven't had a problem. We treat him every month for fleas just in case he comes in contact with other animals. We use Hartz brand that treats fleas, their eggs and larvae. We have never had a flea in our home or found one on him. The stuff works great.