I have experience with caring for a big dog and small dog because I own a German Shepherd for a little over a year and I have learned to bathe, feed, walk and love my dog. And I used to dogsit for a small Chihuahua. When it comes to heavy rain, snow, or hot/ cold weather, it doesn't bother me at all. I love all dogs of different sizes and ages. Also, I can perform long walks and long runs as well as up to an hour if needed. I can carry up to 50lbs. My availability time would be anywhere from 6am to 3pm Monday through Friday and sometimes I might be able to do Saturdays as well ( It just depends on my schedule).