I receive the best results, by photographing the motive before a black or white background and cleaning then in PS the background. Sometimes I work also with masks. With partial after-exposure and manual weaking leads sometimes also to the destination.
10-20/2,8; Nikkor 105/2.8 Macro, Nikkor 70-200/2,8 G ED VR II / Nikko...
You think people hair is difficult - try dog hair! It takes a lot of patience but it is possible with PS.
Also, for a white background with dogs I use sweatshirt fabric. I buy several yards when it's on sale or I have a 50 percent off coupon. When using it for the background and floor, the dogs don't slip and it stays in place pretty well if it's laid on a carpet.