Most of the dogs that i have taken care of have been large, though i do have experience with smaller ones. There has always been a dog in my home even when i was young, i'm very comfortable with them no matter the breed. In most cases when i would take a dog out for a walk back in my home town I would take them to the lake near my house. I've taken care of dogs with ear infections and worms and treated them with the medication provided by the owner.