Ok so I recently got another guinea pig and he is different from the other one. Both are young guinea pigs, I got them both from petco. My other guinea pig is an American guinea pig he is healthy got him September 8. This one has like scruffy hair like an Abyssinian guinea pig. Got him today,his front nails are clear and his back nails are black. The front of his head is black like the skin and his side is has black. There parts of him that is like my other guinea pig (light pink). His poop are small and not to soft just the right amount. He seems fine he doesn’t itch. He doesn’t really get mad when we pet him. He’s kinda skinny so I put pellets, lots of hay, water(with vitamin c drops he still drinks it) and some veggies ( slice of tomato I took out the little seeds, kale, green bell pepper, and some romaine lettuce). Maybe I’m over reacting but I’m still a bit worried. I checked the parts that were black and there was nothing I could see. He’s quiet and moves around fine. Is any of this normal?