AQHA Rules & Regulations:
GENETIC DEFECTS AND UNDESIRABLE TRAITS
Reg 109 The conditions listed below and commonly considered undesirable traits or genetic defects by the Board of Directors SHALL BE INDICATED ON THE REGISTRATION CERTIFICATE for horses foaled on or after the indicated date (Jan 1, 1992), once the condition is known.
One or more of these conditions does not prevent a horse from being used as breeding stock or from participating in AQHA-approved events, subject to rules of the individual event:
Reg 109.2
(a)Parrot Mouth-either overshot or undershot and is defined by the American Association of Equine Practitioners as “no
occlusal contact between the upper and lower central incisors.” Designation
effective for foals born on or after January 1, 1992.
(b) Cryptorchid-meaning less than two visible testicles descended into the scrotum. Designation effective for foals born on
or after January 1, 1992.