I have experience caring for large dogs (boxers, pitt bull, italian mastiff) and will not have trouble controlling high energy dogs. I've raised a bull terrier and black lab in my adolescence from puppies so i also don't mind the little guys. I regularly walk/watch my friends dogs whom many of are rescues and take particular attention when walking them, always being aware of the surroundings to make sure the dog is not put in stressful situations. This can be important if the dog is dog aggressive to most dogs it sees. My first dog was a black lab rescue named Snickers who was gentle with people but especially dog aggressive. Also Snickers lived to be 18yo with very bad arthritis so she required special care, medications and injections. I had additional experience with giving injections to 2 pet cats which frequently got into fights with neighvorhood cats. Usually we would clean their wounds and give them antibiotics by injection.