Black CuSidhe (rare color), is found once every few hundred spawns. These are very dark in color and make for a great pet if you aren't a fan of the white and ice colors.
This store has a UO Black Cu Untrained Pets for sale. BUY OPTION 1: Pay with a debit or credit card through the paypal website. BUY OPTION 2: Pay with your paypal account.
Available on these shards: