Final answer:
Black walnut toxicity in horses can cause laminitis, a painful inflammatory condition that affects the sensitive laminae in a horse's hoof.
Step-by-step explanation:
Black walnut toxicity in horses can cause laminitis. Laminitis is a painful inflammatory condition that affects the sensitive laminae in a horse's hoof, leading to lameness and potential deformity of the hoof.
Black walnut shavings or bedding can release toxins that are harmful to horses, and when ingested, these toxins can disrupt the blood flow to the hoof, resulting in laminitis.