Don't Look a Gift Horse in the Mouth (a.k.a. Gift Horse) - S1.E8

Davy is given a horse, which the Monkees have to hide from their landlord, Mr. Babbitt (Henry Corden). It is returned to a heart-broken child (Kerry MacLane) and father (Jim Boles) after Davy rides it to victory over the horse of the father's neighbor. Famed character actor, and frequent Bob Hope sideman, Jerry Colonna plays veterinarian Doctor Mann.