ok so my yorkie just her 5 puppies two days ago 2 were black and brown but the 3 are chocolate brown i think its weird since i have never seen a brown yorkie the father is also a pure breed yorkie so i dont understand y three came out brown are they rare i read a few things online about them saying that they may have some kind of disease they will have alot of problems and so on is this true? i put a couple of pictures of the mother and her litter