Wait, wait, wait. I am confused!
The colt was stillborn. Or got tangled in the fence? First you say that the colt was stillborn and then in the very next sentence you say "he" got tangled in the fence, as if you were referring back to the colt. I am assuming that "he" actually references the stallion in that "paragraph"?
Do you own the stallion?
Also, your mare doesn't get good marks on her gaits, is this because of an injury? If not, I would seriously reconsider breeding her if she is not what the registry considers quality, especially for a gaited breed. But then again, I don't know anything about gaited breeds.
Proud Breeder of Trakehners and Anglo-Trakehners