How to recognize, treat, and prevent this irreversible joint disease. Osteoarthritis (OA) in horses, formerly known as degenerative joint disease, is the most common joint problem in horses, accounting for more than 60 percent of equine lameness. The term “arthritis” refers to joint inflammation, and there are many types and causes in horses.

Hoof wall separation disease (HWSD) is an inherited disease in some Connemara ponies characterized by separation and cracking of the outer hoof wall. This can lead to ponies having to support their weight on the sole of the hoof instead of the hoof wall, which, in some cases, can result in chronic inflammation, severe lameness, and laminitis. Affected ponies typically show clinical signs within the first six months of life.

Worsening wildfires in recent seasons have left horses and people breathing polluted air filled with smoke and microscopic debris. These fine particles can settle in the lungs and airways, triggering irritation such as watery eyes, nasal drainage, and respiratory infections like bronchitis. They can also worsen pre-existing conditions like asthma, emphysema, congestive heart failure, and other lung or heart issues.

Equestrians who pay close attention to their horse’s feeding program may have noticed a growing conversation around iron levels in equine diets. Concerns about “iron overload” are easy to uncover online, often linked to buzzwords like “oxidative stress” and “free radical damage.” Many blogs and nutrition forums point to high iron intake as a factor in various equine health concerns—from metabolic challenges and poor immune function to weak hooves, dull coats, and growth issues in foals. Numerous websites offer advice, and many promote supplements or detox products claiming to address excess iron. But what exactly is iron overload in horses, and is it something the average horse owner should be concerned about?