My dog is a year old, so she should have more bladder control than a 5 month old. But she did the same thing when we first brought her home a few weeks ago. She would only pee outside as she'd spent her whole life outside, but she wouldn't go very often... like twice in the first two days and she only pooped once. She didn't eat the first day either which may explain some of it, but I think she was just nervous. Now she goes about 5 times a day (not sure how often when she's in the backyard while we're away) and she poops at least once a day. But she still will only go in our yard... never on walks.