I recently purchased a MFT x TWH 7 month stud colt (he was an accident >.<) and was wondering what my registration options where. Both parents are fully registered. The dam is a blue-papered black-white Tobiano MFT and the sire is a graying black TWH.
The colt is a black-white Tobiano that appears to be graying. According to the previous owners he does gait (they breed TWH and MFT, Red and Loki are from their stock :) ).
So far, I've gotten 'Yes, you can register with us' replies from the National Spotted Saddle Horse Association and the National Pinto Horse Registry. Are these reputable registries? He'll be gelded at a year old, but I am considering showing him later on.