The Corso's health list runs hip dysplasia, elbow dysplasia, bloat, entropion, ectropion, cancer, heart disease, demodectic mange, ear infections and bone cancer.
Demodectic mange is the entry worth understanding, because it is easy to misread. Demodex mites live on almost every dog's skin harmlessly; disease occurs when the immune system fails to keep them in check. A small localised patch of hair loss on a puppy's face is common and usually self-resolving. Generalised demodicosis — widespread hair loss, crusting, secondary bacterial infection and thickened skin — is a different matter and points to an underlying immune weakness. In a young dog it has a hereditary component, which makes it a legitimate breeder question, and affected dogs should not be bred from.
Entropion and ectropion sit together, which is unusual. Entropion is an eyelid rolling inward so lashes rub the cornea; ectropion is a lid rolling outward, leaving the eye exposed and prone to irritation. Loose facial skin makes both more likely, and severe cases of either are corrected surgically. Persistent squinting, weeping or rubbing at an eye deserves attention.
Bloat is the acute emergency, as with any deep-chested giant. Split meals, quiet time around eating, a slow-feeder bowl if needed, and knowing the out-of-hours route in advance. Prophylactic gastropexy is a reasonable conversation with a vet.
Bone cancer appears separately from cancer, and the practical rule follows: a limp in a large-breed dog that has not resolved in a week or two is a radiograph, not more rest.
The Pit Bull's list is lighter at the top: hip and elbow dysplasia, skin allergies, heart murmurs, bloat, obesity, cruciate ligament disease, arthritis and cancer. Skin allergies are its most common day-to-day complaint.