I think she is one of these. Her hair style is very weird! Left to grow she has a huge mohawk on her back. https://www.guineapiggles.co.uk/guinea-pig-breeds/#sheba-mini-yakThey all look very bright eyed and healthy. Very cute! How did you get them to sit long enough to take a photo? Is Molly a puruvian or a different type with longer fur?