Common Health Problems in Older Mules: Arthritis, Teeth, Weight Loss, and More

Osteoarthritis is a wear-and-tear joint disease that becomes more common as equids age. In older mules, it may show up as stiffness after rest, shortened stride, reluctance to turn tightly, trouble with farrier work, or a drop in willingness to climb, pull, or carry. Some mules do not look obviously lame. Instead, they become less interactive, move more slowly, or shift weight often.

Joint pain is usually managed, not cured. Your vet may recommend a combination of hoof balance, workload changes, weight management, controlled exercise, and pain control options. In horses, medications such as phenylbutazone, firocoxib, hyaluronic acid, or polysulfated glycosaminoglycan may be considered in selected cases, but these choices depend on the mule's age, kidney and gut health, and overall risk profile. Never start equine pain medication without veterinary guidance.

Dental disease is one of the biggest reasons older equids lose weight. Teeth continue to erupt through life, and aging mouths may develop sharp points, wave mouth, loose teeth, periodontal disease, diastemata, fractured teeth, or painful root problems. Signs can include quidding, slow eating, dropping grain or hay, foul breath, excess saliva, long fibers in manure, nasal discharge, resistance to the bit, and loss of body condition.

Routine dental exams matter even when a mule still seems to be eating. AAEP guidance for horses notes that adults need at least annual dental exams, and those over 10 may need checks every 6 months if they have ongoing issues. For older mules with poor chewing, your vet may suggest softer forage, soaked pellets, or a complete senior feed that can be fed as a mash.

Weight loss in an older mule should always be taken seriously. Merck notes that unexplained weight loss in aged equids is abnormal, not an expected part of getting older. Common causes include dental pain, inadequate calories, poor forage quality, parasites, chronic pain, PPID, metabolic disease, liver or kidney disease, chronic infection, and trouble chewing long-stem hay.

Track body condition and topline with your hands, not only your eyes. Winter hair and blankets can hide muscle loss. If your mule is dropping weight, your vet may recommend an oral exam, fecal testing, bloodwork, and a feeding review. Feed changes should be gradual, because sudden diet shifts can increase the risk of colic or laminitis.

Older mules can also face endocrine and metabolic problems. In equids, insulin dysregulation is a major driver of laminitis, and PPID becomes more common with age. A mule with metabolic trouble may have abnormal fat deposits, a cresty neck, repeated foot soreness, or a history of laminitis. A mule with PPID may show a long or delayed-shedding hair coat, muscle loss, recurrent infections, lethargy, or changes in drinking and urination.

These conditions can overlap. Merck notes that PPID and equine metabolic syndrome can occur together in middle-aged and older equids, and laminitis risk rises when insulin is high. If your mule has sore feet, shifting weight, heat in the hooves, or reluctance to walk, see your vet promptly.

Beyond arthritis, teeth, and weight change, older mules may develop hoof problems, chronic lameness, skin tumors, reduced immune resilience, and digestive trouble such as choke or colic related to poor chewing. Senior equids may also have trouble maintaining muscle even when body fat looks adequate, so a mule can appear round but still be losing strength.

A practical senior-care routine includes regular hoof care, dental checks, parasite control based on testing, body condition monitoring, and a feeding plan matched to chewing ability and workload. Small changes caught early are often easier to manage than a crisis that has been building for months.