* "Brown rabbit" isn't a breed. There are many rabbit breeds that come in brown colors, like Dutch rabbits, Harlequin rabbits, or even some Lionheads themselves.
* Breeding requires specific breeds. To get predictable offspring, you need to breed two rabbits of the *same breed*. This ensures that the offspring inherit similar traits and characteristics.
What could happen if you bred a Lionhead with a non-Lionhead brown rabbit?
* Offspring wouldn't be guaranteed to be Lionheads. The offspring would inherit a mix of genes from both parents, likely resulting in rabbits with various coat types and colors.
* Possible coat variations. The offspring might have some Lionhead-like wool, but it wouldn't be guaranteed. They could also have a mix of long and short fur, or a more typical "brown rabbit" coat.
Important Note: Breeding rabbits is a complex process. It's important to consider the health and temperament of both parents, and to avoid breeding rabbits from different breeds unless you are an experienced breeder with a specific goal in mind.