My 6 month old blue heeler puppy was separated from her litter at 5 weeks and I would put money on it that is the reason she is so anxious. We do not have a fenced in back yard and she is at the point where I can't take her for walks or barely take her to use the bathroom in the front yard because the few passer-by cars frighten her. Her fight or flight kicks in and she will either try and run after them or cower between my legs. She gets very upset in the car or when I've tried taking her into a store. The park seems to be too much as well. She is frightened of other dogs (even though she does great with our other one at home.) We are very slowly working with a trainer but in the mean time with me not being able to exercise her more effectively she turns into a looney toon in the house, even gets a bit aggressive with growling and snapping. We do puzzles and play fetch down the hall but until we can get her confidence up I'm not sure how to entertain her other than that! Any suggestions on this?