Strawberry foot rot
Supraspinatus calcifying (mineralised) tendinopathy
Supraspinatus non-mineralised tendinopathy (supraspinatus tendinosis)
Supravalvular aortic stenosis
Supravalvular pulmonic stenosis
Supraventricular tachycardia (SVT)
Suture line periostitis
Swayback / Enzootic Ataxia
Swim bladder disorder
Subspectacular abscess