Thrifty for decades, then the teeth set the limit
An aging Mustang carries a metabolism shaped by scarcity. These horses descend from animals who survived on sparse range, and many senior Mustangs remain strikingly easy keepers, round on hay that would leave another breed lean. Through the early senior years, appetite is typically robust and weight stable or creeping up, with a cresty neck and fat pads behind the shoulders as the signs an owner should heed rather than celebrate.
The reversal, when it comes, is usually mechanical. Cheek teeth wear into sharp points and uneven surfaces across a long life, chewing becomes slower and less complete, and the horse who once thrived on coarse forage begins leaving long stems, dropping wads of half-chewed hay, and losing condition despite walking to the feeder with every appearance of hunger.
A Mustang's coat and topline hide the first losses
In an aging Mustang, the first weight change is usually topline, not belly. Muscle melts along the neck, back, and hindquarters, the withers stand out more sharply, and the back can begin to dip, while the barrel still looks adequately covered, especially under the dense coat Mustangs grow. A horse can photograph as round and feel notably ribbier than the picture suggests.
Score this horse by hand on a rhythm: ribs that should be felt with light pressure rather than seen or buried, a crest that should not feel hard and thickened, and a tailhead that should keep some padding. Use a weight tape at the same girth position each month for a trend number, and record it, because the Mustang combination of thick coat and stoic temperament defeats casual impression completely.
Herd rank and quidding, the two appetite clues owners miss
An aging Mustang's appetite should be judged by what disappears, not by eagerness at feeding. Watch the hay itself: piles of quids, those damp cigar-shaped wads dropped beside the net or feeder, mean the horse is taking in less than he appears to chew. So does a senior who now needs twice as long to finish, or who swaps to stealing soft soaked feed offered to another horse.
Rank matters equally in a herd-kept Mustang. An old horse who once held his place may be moved off hay piles by younger animals and eat the trampled remainder at the margins. Feed seniors in a separated space or spread far more piles than horses, and observe a full meal occasionally rather than assuming the morning bucket tells the story.
Feeding the senior Mustang once chewing falters
For an aging Mustang whose teeth limit hay chewing, the answer is forage in a form he can manage: shorter-chopped forage, soaked hay cubes or pellets served as a mash he cannot sort, and smaller, more frequent offerings so intake stays steady across the day. Change feeds gradually over a week or more, since a thrifty gut adjusted to plain forage reacts badly to sudden richness, and be cautious with high-sugar feeds for a breed prone to storing every surplus calorie.
Dental attention is the foundation under all of it, with regular veterinary dental checks so chewing surfaces are maintained before quidding becomes weight loss. Note each dental visit and its findings beside the weight record, because appetite recovery after dental work is one of the clearest patterns a senior Mustang's history can show.
When a Mustang's appetite change needs a vet promptly
An aging Mustang who stops eating, leaves most of a meal repeatedly, drools, tilts the head while chewing, or shows feed packing in a cheek needs a veterinarian promptly. Choke, where feed material blocks the throat and the horse coughs, stretches the neck, and discharges feed from the nostrils, is an emergency in any horse and a recognised risk when chewing fails. Rapid weight loss, a dull coat with delayed shedding, or drinking and urinating patterns that change alongside appetite also warrant prompt attention.
Steadier drift belongs in a planned senior review with your records ready. Storing a Mustang's weight tape readings, dental notes, and appetite observations in KinsLe through Pet Passport puts the whole senior story in one packet for that visit.