Kinda of a long story but I need help. We just got a new puppy who is 4 months old and she use to have a home with another dog that she was happy and playful with but the owner couldnt keep her. I owner only knows she is a mix pit because the mom is a pit but she didnt know who the dad was. Well we brought her home last night and she is depressed. You can tell. She is very very slowly starting to eat and drink water. She didnt pee or poop for a whole day. The owner had a doggie door but we cant have one because we have 2 kids and a non fenced in back yard. We wanna train her to go to the bathroom when we take her for a walk. BUt the other problem is she never has had a collar or leash. And one more thing is she is very jumpy and kinda scared if we try to give her food or water. She acts like we are going to hit her but we would never ever even implicate that.