Hes almost 11 pounds i don't understand how tho... we are a really active family he goes everywhere with me... park on the weekdays, beach or light hiking which he loves on the weekends but he just keeps getting fatter.. we live in a condo so he doesn't have a yard to run around in.. i don't bring him to the dog park because hes unpredictable.. he gets along with dogs sometimes and other times hes aggressive towards them.. and i don't want to put him or any other dog in a situation where one may get hurt. What are some other things i can do with him??? I don't want his health to be effected by his umm...fatness!!