My female 12 month old Dwarf Lop has a ridge in her fur from about the middle of her back all the way down to her tail. It kind of looks like a Rhodesian Ridgeback's back. She's a pure dwarf lop and is brown and white splodges on her face, ginger and white on her neck, and on her back is a chocolate-and-tan brindle pattern. Is this a trait for rabbits and if so is it rare? People have asked me "Is it her spine?' but it's not - she's a really greedy rabbit who loves her food. She's had it ever since we got her when she was 7 weeks old.