Quote Originally Posted by hannibal View Post
I had one bnet with over 100 mounts and my second with only 7. I xferred a char from the first bnet to the second and it moved all the mounts over to my second bnet.

The blizzard FAQ states that account wide mounts and achievements will xfer, but battle pets will not.
I did the same..its soo fun riding 5xMechohogs ( spell check ) at lvl 20 8)