What is the name of this movie?

Okey this might be a little strange but i watched a movie on tv 4years ago on disney channel and i loved it but i can't remeber the name, i can only remeber parts of the movie so i need u guy's help, so it's about two sisters that r ophens and they find a little puppy one morning and they took it back to their dorms and start to look after ut but one they they both got adopted by a married couple and they moved into a big city, the sisters also secrectly took their dog with them, the couple lives in this place said no dog's allowed somthey hid the dog the whole time, but one day for some reason the older decided to run away with the dog and the younger sister cryed and everything, soz this is all i can remeber but i'm not sure if it is a disney movie or not. Ty correct answer get 10 points :)