I don't know too many advantages of black vs. white fur on a dog but if you use human sunscreen, avoid any that has zinc oxide or PABA. Most likely the dog will try to lick the lotion off and these ingredents can be dangerous. Also, use at least SPF 15, and make sure you put the sunscreen on the ears, nose and belly..those are the areas most likely to get burned.

Good luck picking your new puppy.