Donkey Diet for Cushing’s Disease: Feeding PPID Donkeys Safely

PPID, also called equine Cushing’s disease, is common in older equids and can overlap with obesity, insulin dysregulation, and laminitis risk. In donkeys, feeding matters because they are efficient at using calories and can become metabolically unstable if they are overfed or restricted too aggressively. That means the safest plan is usually a measured, forage-based diet tailored with your vet.

For many PPID donkeys, the goal is to keep sugar and starch low while still providing enough fiber every day. Equine PPID and metabolic guidance commonly recommends low-NSC forage, especially when laminitis or insulin problems are part of the picture. In practical terms, that often means tested grass hay, limited pasture, and avoiding sweet feeds, cereal grains, molasses-heavy products, and high-sugar treats.

Donkeys are different from horses in one important way: they are at meaningful risk for hyperlipaemia if feed intake drops too fast. So even if your donkey is overweight, weight loss should be gradual and supervised. A donkey with PPID may also need dental care, hoof support, and medication such as pergolide, because diet alone may not control the disease.

If your donkey has trouble chewing long-stem forage, your vet may suggest soaked hay pellets, soaked hay cubes, or other low-sugar fiber sources. That can help maintain fiber intake without relying on grain-based concentrates.

There is no one-size-fits-all amount, because the right ration depends on body condition, laminitis history, pasture access, dental health, and whether your donkey also has insulin dysregulation. As a starting point, many equine metabolic guidelines use forage intakes around 1.5% of body weight in dry matter per day for weight loss, with adjustments based on response and veterinary supervision.

For donkeys, that number should be used carefully. They often need fewer calories than horses, and many do well with a portion of clean barley straw or other appropriate straw mixed with low-NSC hay to reduce calorie density while preserving chewing time. Your vet may recommend weighing forage rather than estimating by flakes, because small errors add up quickly in easy keepers.

If hay has not been tested, ask your vet whether a forage analysis is worthwhile. A hay analysis usually costs about $30-$70 in the US and can help identify NSC, protein, and mineral gaps. If the hay is higher in sugar than desired, some vets may recommend soaking hay before feeding, but soaked hay can lose minerals, so a low-sugar balancer is often still needed.

Pasture is the hardest part to control. Some PPID donkeys can tolerate limited turnout, while others with active laminitis or marked insulin problems need much stricter grass restriction. Never make abrupt feed cuts without veterinary guidance, because a donkey that stops eating or loses weight too fast can become critically ill.

Watch for signs that the current diet is not working well. Red flags include a cresty neck, persistent obesity, new or recurrent laminitis, foot soreness, shifting weight, reluctance to walk, increased drinking or urination, delayed shedding, muscle loss over the topline, and unexplained weight loss despite a good appetite. In donkeys, laminitis can be subtle, so even mild stiffness or lying down more than usual deserves attention.

A donkey with PPID may also show changes that suggest medication or feeding needs to be rechecked. Examples include poor appetite, dropping feed, quidding, worsening coat changes, repeated hoof abscesses, or a body condition that is moving in the wrong direction. If pergolide has been started, some equids develop temporary inappetence, which should be discussed with your vet promptly.

The most urgent nutrition-related concern in donkeys is hyperlipaemia. This can happen when a donkey goes off feed, is stressed, painful, or put on an overly strict diet. Early signs may be vague, such as dullness, reduced appetite, depression, or worsening weakness. Because it can progress quickly, any donkey that is not eating normally should be seen by your vet as soon as possible.

See your vet immediately if your donkey has signs of laminitis, stops eating, seems depressed, or develops sudden weakness. Those problems can become emergencies faster in donkeys than many pet parents expect.

If your donkey with PPID cannot safely eat rich pasture or typical horse treats, safer options usually focus on low-sugar fiber. Good examples may include tested low-NSC grass hay, carefully selected straw-hay mixes, soaked hay when your vet recommends it, and a low-sugar ration balancer to cover vitamins, minerals, and protein without adding much starch.

For treats, think tiny portions and low sugar. Small pieces of celery, a few soaked hay pellets, or a veterinarian-approved low-NSC treat are often safer than apples, carrots in large amounts, sweet feed, or commercial snacks with molasses. Even healthy foods can become a problem if they add too much sugar or too many calories over time.

If chewing is difficult, soaked hay cubes, soaked hay pellets, or soaked beet pulp without added molasses may be discussed with your vet as fiber alternatives. These options can help older PPID donkeys maintain intake while still avoiding high-starch concentrates. The exact choice depends on dental status, body condition, and bloodwork.

The safest alternative is not a single feed. It is a feeding plan: weighed forage, low sugar, gradual changes, regular hoof care, and follow-up with your vet. That approach supports the whole donkey, not only the diagnosis.