You probably won't be able to keep her from chasing cats, some dog's just do it because nature is telling them to. You do need to stop this behavior ASAP, cats can do a ton of damage to the small dogs, make them look like they've been in a fight with razor blades. Eye damage, it gets ugly. I recommend putting her on a leash no matter where you are going out to, train her to sit before you open the door, if when you touch the door she gets up take your hand away from the handle, tell her to sit again when she successfully sits through opening the door without getting up walk out the door with her, if she tries to dart ahead of you, stop moving. (remember to keep her on a leash!) It'll take a while to keep her from darting out of the door, but you have to teach her. So many bad things can happen to them when they do that.
Sorry I only have amateur advice to give, but in the very least, stop letting her run off leash, for her sake. |