We have a 20 week old shih tzu and when we got her she was being fed eukanuba she wasn't eating very much of it but if she could get to the dry cat food she scoffed it back, we changed her to JWB and for the first few days she ate it then turned her nose up at it. I have persevered with it but she only seems to eat it when she is really hungry leaving it till night time, however if she can get to the cat food she will scoff it back. I am wondering whetherb to change her food again or stick with it. She is only having one poo a day which doesn't seem much. She is lively not thin ,but not fat she doesn't have a little puppy belly.

Any help appreciated