Yes Alapahas come in merle. It isn't so rare, but I suspect they want so much because it is a particularly well coloured dog with a good build. The catahoula bulldog isn't registered anywhere, but has been around for over 100 years. It is a cross between a leopard dog and a bulldog, not really a purebred. They are an adorable working breed though. Bulldogs come in the same colours you'd see on a staff or pitt, to give you an idea of the variety, you just don't see the colors so often on show bred bulldogs.