Quidding in Sheep: Why Sheep Drop Feed While Chewing

Quidding is the term used when a sheep drops balls or wads of partially chewed feed from the mouth. Pet parents and producers may notice damp clumps of hay, grass, or cud on the ground near the feeder, along with slower eating and declining body condition. Quidding is not a disease by itself. It is a clue that chewing, swallowing, or oral comfort is not normal.

In sheep, effective chewing depends on healthy incisors, molars, gums, tongue, jaw alignment, and a comfortable mouth and throat. If any part of that system is painful or not working well, feed may be chewed poorly and then fall out. Dental wear is a common reason in older sheep, but mouth lesions, infections, trauma, and foreign material can also cause the same outward sign.

Because sheep are prey animals, they often hide illness until weight loss or weakness becomes obvious. A sheep that is quidding may still walk to the feeder and act interested in food, so the problem can be missed early. If you see repeated feed dropping, it is worth having your vet examine the mouth and overall condition before the sheep loses too much weight or becomes dehydrated.

The most common causes of quidding in sheep are problems that make chewing painful or ineffective. These include worn, loose, broken, or missing teeth; abnormal tooth wear; gum disease; and age-related dental loss. Sheep rely on proper contact between the lower incisors and the upper dental pad, plus healthy cheek teeth for grinding forage. When that system is off, feed may be chewed poorly and dropped.

Mouth and throat pain can also trigger quidding. Oral lesions from contagious ecthyma (orf) can extend into the mouth, and secondary bacterial infection may follow. Bluetongue can cause oral soreness, salivation, and ulceration, making sheep hold feed in the mouth and chew abnormally. Less common but important causes include foreign bodies, pharyngeal trauma, tongue swelling, jaw infection, abscesses, and soft-tissue infections such as actinobacillosis.

Sometimes the issue is mechanical rather than infectious. A sheep may have a jaw injury, a malformed bite, or severe wear from age and grazing conditions. In advanced cases, the sheep cannot process enough forage to maintain body condition even though appetite seems present. That is why quidding should be treated as a meaningful clinical sign rather than a minor feeding quirk.

Diagnosis starts with a hands-on history and exam. Your vet will usually ask when the quidding started, whether weight loss is present, what the sheep is eating, and whether other flock members have mouth lesions or similar signs. A body condition check, temperature, hydration assessment, and close look at the lips, incisors, jaw, and oral cavity help narrow the list of likely causes.

Many sheep need a more complete oral exam than can be done while fully awake. Depending on temperament and pain level, your vet may recommend restraint, sedation, or both to inspect the cheek teeth, tongue, gums, palate, and back of the mouth safely. If there is concern for tooth root disease, jaw infection, fracture, or deeper oral trauma, skull radiographs or referral imaging may be helpful.

Additional testing depends on what your vet finds. Swabs, biopsy, or PCR may be used if contagious ecthyma or another infectious oral disease is suspected. If there are ulcers, swelling, or a flock-level outbreak, your vet may also consider reportable or regionally important diseases in the differential list. The goal is to identify whether the problem is primarily dental, infectious, traumatic, nutritional, or structural so care can match the sheep’s needs.

Prevention starts with routine observation. Watch sheep while they eat, not only when they are standing at the feeder. Early clues include slower chewing, preference for softer feeds, dropping small wads of forage, and gradual body condition loss. Catching these changes early gives your vet more options and may help avoid severe weight loss.

Good flock management also matters. Provide forage that matches the age and dentition of the group, and pay close attention to older sheep with worn mouths. Regular body condition scoring, culling decisions based on chronic poor mouth function, and prompt evaluation of facial swelling or oral odor can reduce long-term problems. Avoid rough handling of the mouth and use dosing equipment carefully, because pharyngeal trauma can occur in ruminants.

Infectious disease prevention is also part of the plan. Isolate sheep with suspicious mouth lesions until your vet advises otherwise, since contagious ecthyma is zoonotic and can spread through contaminated crusts and equipment. Work with your vet on vaccination, biosecurity, parasite control, and nutrition programs that fit your flock. Quidding cannot always be prevented, especially in aging sheep, but regular monitoring and earlier intervention can make it much easier to manage.