when my black lab (3 months) doesn´t want to walk anymore, she just lays down. she has me stumped, i just drop the leash and then she gets up and follows me. i think i am starting a bad habit. ALSO, i am having trouble house breaking her. she doesn´t seem to get the difference between outside and inside, or maybe she just cant hold it at all. today we went outside for over an hour waiting and as soon as she came in she went pee. what can i do?