We've tried them all! And we've learned that pet brushes are NOT made for sheepskin.
Here at Desert Breeze Distributing, we have years of experience brushing out sheepskin. We have learned the hard way that not all brushes are the same, and some can even damage sheepskin. A dog slicker brush is for dogs, and a carding brush is for preparing loose wool for spinning. Neither are made for sheepskin. Wire thickness and length, density, curve and shape of the cushion are all important factors. We could not find such a brush, so we had one custom made, and it's perfect for sheepskin.