Quidding is when a horse drops partially chewed food from its mouth while eating. You’ll typically find wads of hay or clumps of grain on the ground around the feed bucket, sometimes still shaped into tight little balls. It’s one of the earliest signs that something is wrong inside a horse’s mouth, and it often points to a dental problem that needs attention.
What Quidding Looks Like
The hallmark of quidding is finding balls or clumps of partially chewed forage that a horse has spit out or let fall from its mouth. These boluses can range from small bits of dropped grain to large wads of hay that look like they’ve been chewed but never swallowed. Horses that quid forage material, like hay or grass, generally have more severe chewing difficulty than those dropping a few pellets of grain.
One theory is that quidding acts as a built-in safety mechanism. A horse that can’t properly grind its food seems to recognize, on some level, that swallowing large unchewed chunks of forage could be dangerous. Rather than risk choking, the horse ejects what it can’t break down. It’s not a conscious choice so much as a protective reflex.
Why Horses Quid
Dental problems are the most common cause. Horses’ teeth grow continuously throughout their lives, and the constant grinding motion of chewing creates wear patterns that can become uneven over time. Sharp points are one of the most frequent issues: they tend to develop on the cheek side of the upper teeth and the tongue side of the lower teeth. These points dig into the soft tissue of the cheeks and tongue, making chewing painful and inefficient.
Other dental problems that lead to quidding include fractured teeth, periodontal disease, and gaps between teeth where food packs in and causes irritation. Older horses are especially prone because decades of grinding eventually wear teeth down to the point where they lose effective chewing surfaces altogether. Once a horse can no longer break forage into small enough pieces, quidding becomes almost inevitable.
Less commonly, quidding can stem from neurological problems or soft tissue conditions that affect the nerves and muscles involved in chewing and swallowing. These non-dental causes are rarer but worth considering when dental treatment alone doesn’t resolve the problem.
Other Signs to Watch For
Quidding is often the first visible clue, but it rarely appears in isolation. Horses with dental trouble may also tilt their head to one side while eating, favoring the less painful side of their mouth. Foul-smelling breath is another red flag, often pointing to infection, decaying food trapped between teeth, or periodontal disease. You might also notice your horse eating more slowly than usual, losing interest in hay, or simply being unable to chew feed at all.
Because dental problems in horses can be difficult to spot from the outside, these behavioral changes during meals are often the owner’s best window into what’s happening. Weight loss that creeps up over weeks or months, especially in an older horse, can sometimes be traced back to quidding that went unnoticed.
How the Problem Gets Diagnosed
A veterinarian examining a horse for quidding will need to look inside the mouth, which requires some preparation. Horses are typically sedated to keep them calm and still. Once sedated, the vet places a mouth speculum, a device that holds the jaw open so both hands are free to work. The horse’s head is then elevated using a dental headstand or a halter rigged with a rope to keep it at a comfortable working height.
With the mouth open and well-lit, the vet examines the teeth, gums, and soft tissue using a combination of a headlamp, dental mirror, and sometimes an oral endoscope (a small camera). The endoscope is particularly useful for seeing surfaces that are hard to reach directly, like the back molars and the gum line behind the last teeth. A dental explorer and periodontal probe help the vet check for cracks, loose teeth, and pockets of infection along the gum line. All findings are typically recorded on a dental chart to track changes over time.
What Happens If Quidding Goes Untreated
The most immediate risk is poor nutrition. A horse that can’t chew effectively isn’t extracting the calories and fiber it needs from forage. Over time, this leads to steady weight loss, reduced energy, and a declining body condition that becomes harder to reverse the longer it continues. Senior horses are especially vulnerable because they have fewer reserves to draw on.
There’s also a risk of choke, which in horses means an obstruction of the esophagus rather than the airway. Poorly chewed food is more likely to lodge in the esophagus on the way to the stomach. If the blockage isn’t cleared, the horse can’t eat or drink, and dehydration sets in. Repeated choke episodes can scar the esophagus, reducing its diameter and elasticity, which makes future episodes even more likely.
Feeding a Horse That Quids
When a horse can no longer handle long-stem hay, the goal is to deliver the same nutrition in a form that requires less chewing. Pelleted senior feeds are one of the simplest options because they already have forage processed into the pellet. Soaking pellets in water before feeding creates a soft mash that’s even easier to manage. Hay cubes and other cubed or pelleted forages can substitute for traditional hay, giving the horse fiber without requiring it to grind tough stems.
These dietary adjustments don’t replace dental care, but they keep the horse nourished while the underlying problem is being addressed. For some older horses whose teeth are simply worn beyond repair, modified feeding becomes a permanent part of their management. The key is making sure total fiber and calorie intake stays adequate, since a horse that looks like it’s eating well can still be losing weight if it’s dropping half its feed on the ground.