I think the light brown is too light and really doesn't showcase the cute little dog. I feel that both the other ones work but for different reasons. I have one daughter who would only want the brown background. She always prefers the simplified look and it would blend in perfectly with her decor. But, another daughter would absolutely go nuts over the dog bones print. Yes, it is busy, but it is also so fun. So I think you should just think about your friend. What is he decor like? what type of clothes does she wear (solids or perky prints)? Another solution would be to use the brown for the front and the bones for the backing.