Best Hay for Mini Donkeys: Nutrition and Feeding Tips

Author: Elliott Garber, DVM

Why Hay Selection Matters for Miniature Donkeys

Miniature Mediterranean donkeys evolved on the sparse, rocky hillsides of Sicily and Sardinia, where food was limited and nutrient-poor. That evolutionary history gave them a remarkably efficient digestive system. They extract more energy from fibrous plant material than horses do from the same forage. This is a survival advantage in the wild, but in a domestic setting with unlimited access to rich feed, it becomes the single biggest health liability miniature donkey owners face.

Obesity is the number one health problem in miniature donkeys. It leads to hyperlipemia (a potentially fatal condition where excess fat mobilizes into the bloodstream), laminitis, insulin resistance, and shortened lifespan. The foundation of preventing all of these problems is choosing the right hay.

The Best Hay Types for Miniature Donkeys

Grass hay is the correct base diet for miniature donkeys. The goal is high fiber, low protein, and low sugar. Three types stand out as the best options.

Timothy Hay

Timothy hay is the gold standard for miniature donkeys. It offers the ideal nutritional profile: 8 to 11% crude protein, 32 to 36% fiber, and low nonstructural carbohydrate (NSC) content, typically 6 to 10%. The coarse stem structure promotes healthy chewing behavior and slow intake. It is widely available across the United States and easy to source in consistent quality.

Bermuda Grass Hay

Bermuda grass hay is an excellent choice, particularly in southern climates where timothy is less available. It tends to be slightly lower in protein and calories than timothy, which actually makes it a strong option for donkeys prone to weight gain. Look for mature Bermuda hay with good stem structure rather than fine, leafy cuttings.

Orchard Grass Hay

Orchard grass is softer and more palatable than timothy, making it a good option for older donkeys or those with dental issues. Protein content ranges from 9 to 12%, which is slightly higher than timothy, so monitor body condition more closely. Many owners mix orchard grass with timothy or Bermuda to balance palatability and calorie content.

Why You Should Avoid Alfalfa

Alfalfa is too rich for miniature donkeys. With crude protein levels of 15 to 22% and significantly higher calorie density than grass hays, feeding alfalfa will cause weight gain in most miniature donkeys, even in small amounts. It also contains excess calcium, which can contribute to urinary calculi (bladder stones) in jacks and geldings. The only situations where alfalfa may be appropriate are for pregnant or lactating jennets, or severely underweight animals, and even then it should be mixed with grass hay and monitored by a veterinarian. For everyday feeding, avoid it entirely.

How Much Hay to Feed

The standard guideline is 1.5 to 2% of body weight per day in dry forage. For a typical miniature donkey weighing 250 to 350 pounds, that works out to roughly 3 to 5 pounds of hay daily.

• 200 to 250 lb donkey: 3 to 4 lbs of hay per day
• 250 to 350 lb donkey: 4 to 5 lbs of hay per day
• 350 to 450 lb donkey: 5 to 7 lbs of hay per day

These are starting points. Adjust based on body condition scoring, which you should perform monthly. A donkey in ideal condition (body condition score of 3 on the 1 to 5 scale) has ribs that are not visible but easily felt with light pressure. If you cannot feel ribs without pressing firmly, the donkey is overweight and needs less hay.

Split the daily ration into two or three feedings. Donkeys are trickle feeders designed to eat small amounts throughout the day. Using small-hole hay nets (1.5 to 2 inch openings) slows consumption, reduces waste, and mimics the natural grazing pattern that keeps the hindgut functioning properly.

If your donkeys have pasture access, reduce hay proportionally. During lush spring and fall growth, a grazing muzzle may be necessary to prevent overconsumption of rich grass. Many experienced miniature donkey breeders use dry lots with controlled hay feeding rather than open pasture, especially for easy keepers.

Using Straw as a Feed Supplement

Barley straw or oat straw can be a useful addition to a miniature donkey’s diet. Straw is very low in calories and protein but high in fiber, making it an effective way to provide bulk and chewing time without adding significant calories. Many donkey owners feed a 50/50 mix of straw and grass hay for overweight animals or easy keepers. Straw satisfies the donkey’s need to chew and forage without the caloric load of even grass hay.

Make sure the straw is clean, dry, and free of mold. Wheat straw is less palatable and more commonly used as bedding than feed. Barley and oat straw are better accepted.

Soaking Hay for Overweight Donkeys

For donkeys that need to lose weight or have metabolic concerns like insulin resistance, soaking hay in water for 30 to 60 minutes before feeding can reduce the sugar content by 20 to 40%. Drain the water completely before feeding. This technique is especially useful during seasons when even grass hay may have higher sugar content, such as after a frost or during rapid spring growth.

Soaked hay should be fed within a few hours, as it spoils faster than dry hay, particularly in warm weather.

How to Evaluate Hay Quality

Not all hay is created equal, even within the same type. Here is what to look for when buying hay for your miniature donkeys.

Visual Inspection

• Color: Good grass hay should be green to light green. Yellow or brown hay has lost nutritional value from sun bleaching, rain damage, or age. Avoid hay with dark spots, which indicate mold.
• Leaf to stem ratio: Moderate leafiness is fine, but very stemmy, mature hay is lower in calories (which can actually be beneficial for donkeys prone to obesity).
• Weeds and debris: Check for foreign plants, blister beetles (especially in alfalfa, another reason to avoid it), and excessive seed heads.

Smell and Feel

• Smell: Quality hay smells fresh and slightly sweet, like dried grass. Musty, sour, or ammonia-like odors indicate mold or fermentation. Never feed moldy hay. It can cause colic and respiratory disease.
• Dust: Shake a flake and watch for dust clouds. Excessive dust causes respiratory irritation and may indicate mold spores. Slightly dusty hay can be dampened before feeding, but heavily dusty hay should be discarded.
• Moisture: Hay should feel dry and crisp, not damp or warm. Warm bales indicate active microbial fermentation, which can lead to mold and, in extreme cases, spontaneous combustion in storage.

Hay Analysis

If you are buying hay in bulk or want precise nutritional data, submit a sample to a forage testing lab. A basic analysis costs $15 to $30 and provides crude protein, fiber (ADF and NDF), and NSC values. For miniature donkeys, look for hay with less than 10% crude protein and NSC below 12%.

Proper Hay Storage

Good hay stored poorly becomes bad hay. Follow these principles to protect your investment and your donkeys’ health.

• Store hay under cover, protected from rain and direct sunlight. A barn, shed, or covered hay storage area is ideal.
• Elevate bales off the ground on wooden pallets to prevent moisture wicking from concrete or soil.
• Maintain airflow between bales and walls. Do not stack bales directly against exterior walls where condensation can form.
• Rotate stock: use older bales first and stack new purchases behind existing inventory.
• Inspect stored hay monthly for signs of mold, pest activity, or moisture intrusion.

When Hay Alone Is Not Enough

For most healthy adult miniature donkeys at maintenance, quality grass hay provides everything they need except minerals. A free-choice mineral block formulated for equines (not cattle) or a loose mineral supplement covers trace mineral needs, including copper, zinc, and selenium.

There are specific life stages and situations where nutritional needs increase beyond what grass hay alone provides:

• Pregnant jennets (last trimester): Energy and protein requirements increase. Supplementing with a small amount of a low-starch, high-fiber concentrate or adding a small proportion of higher-quality hay may be warranted. Consult your veterinarian for specific recommendations.
• Lactating jennets: Producing milk is the most energy-demanding phase. These jennets may need 25 to 50% more feed than maintenance, and a concentrate designed for equines can help meet the demand.
• Growing foals after weaning: Young donkeys need slightly higher protein (10 to 14%) to support growth. A mix of grass hay with a small amount of a balanced growth feed is appropriate. For more on foal nutrition and care, see our detailed guide.
• Senior donkeys with dental issues: Donkeys that can no longer chew long-stem hay effectively may need soaked hay cubes, chopped hay, or a senior equine feed to maintain body condition.
• Underweight or recovering animals: Donkeys coming from neglect or illness may temporarily need higher-calorie feed to rebuild condition, under veterinary guidance.

Fresh, clean water should be available at all times. Miniature donkeys typically drink 2 to 4 gallons per day, with higher intake in hot weather, during lactation, or when eating dry hay exclusively.

Feeding Mistakes to Avoid

Beyond avoiding alfalfa, there are several common feeding errors that cause problems in miniature donkeys:

• Feeding horse-formulated concentrates: Most horse feeds are too high in sugar and starch for donkeys. If supplementation is needed, choose products specifically formulated for donkeys or low-starch equine feeds.
• Free-choice hay without restriction: Unlike horses, most miniature donkeys will overeat if given unlimited hay. Measured portions and slow-feed nets are essential.
• Treats in excess: Carrots, apples, and commercial treats add sugar and calories quickly. Limit treats to small, infrequent portions.
• Ignoring body condition changes: Donkeys accumulate fat in the crest of the neck, over the rump, and in fat pads along the shoulders. These deposits can become permanent. By the time a donkey looks obviously fat, the problem is already advanced. Monthly body condition scoring catches weight gain early.

Getting hay selection and feeding management right is the single most impactful thing you can do for your miniature donkey’s long-term health. It is not complicated, but it does require attention and consistency. Choose quality grass hay, measure portions carefully, and monitor body condition regularly. If you are looking to add a miniature donkey to your property, browse miniature donkeys for sale on Creatures, and connect with experienced miniature donkey breeders who can share what feeding practices work best in your region.