We try to get ours (one 7 lb, one 8 lb) to run around and get out of breath at least once every day. Sometimes we take them for a walk around the block, sometimes they just run around the house and play together, and sometimes we chase them around the house and play with them to get them a little exercise. I'd say we try and get 15 minutes or so of good running around or walking in each day. We've got one who stays nice and thin, and one who is a little fattie.
