I grew up around dogs and have owned over four(a black lab, a Walker coon hound, a shar pei/terrier and a Pomeranian) and look forward to having many more including my dream dog, a Great Dane. I guess that proves that I am comfortable with ALL sizes, ages, and breeds. I am also comfortable with any illness and distributing medications any dog would need. I wouldnt mind helping to potty train or obedience train a dog as I have done both with almost all my dogs as well as some I have nannied. I am very aware that each owner handles their dogs in their own way (i.e. punishment, harnesses, anti-bite mouths, etc) so whatever you as the owner asks of me, I will do. Like I said, big or small I love them all and I would treat your baby as if he/she was my own.