Hoof Diseases in Dairy Cattle

Digital dermatitis in dairy cattle is a highly contagious bacterial skin infection near the heel bulbs, caused by Treponema spirochetes. It presents as a circular, painful lesion with a characteristic strawberry-red surface. Without a footbath protocol, it spreads rapidly through a herd via contaminated alleys and slurry.

Foot rot is an acute infection of the interdigital space caused by Fusobacterium necrophorum. It produces rapid-onset swelling of both claws, a foul odor, and sudden severe lameness. Wet flooring, skin abrasions, and high stocking density all increase herd exposure risk.

A sole ulcer is a localized lesion of the solar corium, most often found at the sole-heel junction of the outer hind claw. Sustained mechanical pressure impairs blood flow to the corium, often triggered or worsened by subclinical laminitis. It is one of the leading causes of chronic lameness in housed dairy cows.

White line disease occurs when the junction between the hoof wall and the sole horn separates, creating a pathway for debris and bacteria to track deeper into the hoof. Untreated separation can progress to a deep-seated abscess. It most commonly affects the abaxial white line of the outer hind claw.

Laminitis in cattle is a systemic condition in which impaired blood flow to the laminar corium disrupts normal horn growth. Strongly associated with transition period nutrition and metabolic stress, it produces sole hemorrhages and weakened horn that predispose cattle to sole ulcers, white line disease, and double sole.

Corn is an overgrowth of firm fibrous tissue in the interdigital space between the claws. It develops in response to chronic irritation, with higher incidence in herds with rough flooring or in cattle with a genetic predisposition. A large tyloma forces the claws apart, causing persistent mechanical lameness.

Toe ulcer is a non-infectious claw condition where the corium at the tip of the claw breaks down and ulcerates. Caused by thin sole from laminitis, over-trimming, or white line disease tracking forward to zone 3. Stage 1 is manageable at the trim chute. Stage 2 involves the coffin bone and requires a veterinarian.

Double sole is a structural condition in which a cavity forms between two distinct layers of solar horn, most often as a consequence of disrupted horn growth secondary to laminitis. The trapped space can accumulate debris, creating conditions for abscess formation if contaminated material enters.