The Welsh Springer's health list is short — hip dysplasia, ear infections, epilepsy, glaucoma and hypothyroidism — and glaucoma is the entry that separates a well-bred dog from a lucky one.
Glaucoma is raised pressure inside the eye. In its primary form it arises from the anatomy of the drainage angle rather than from injury or another disease, and the Welsh Springer is among the breeds with a recognised predisposition. It is painful, and an acute attack can destroy vision within a day or two if pressure is not reduced quickly.
What makes this actionable rather than merely worrying is that the drainage angle can be examined before any problem develops. Gonioscopy is a straightforward ophthalmic examination that assesses whether the angle is abnormally narrow, and responsible breeders in the breed have their stock examined and can tell you the result. Some schemes recommend repeating it as the dog matures, since the angle can change.
Ask a Welsh Springer breeder directly whether both parents have been gonioscopy-tested and what the findings were. Alongside that, ask for hip scores and any history of epilepsy in the line.
As an owner, know the acute signs regardless: a suddenly painful eye, squinting, a cloudy or bluish cornea, redness, a dilated pupil that does not respond to light, and a dog that is subdued or rubbing at its face. That is a same-day emergency.
Ear infections are the routine maintenance issue — drop ears on a dog that swims and pushes through cover trap moisture, so weekly checks and drying after swimming are part of ownership.
The Malamute's list is longer and heavier: hip and elbow dysplasia, bloat, hypothyroidism, epilepsy, progressive retinal atrophy, hereditary cataracts, zinc-responsive dermatosis and inherited polyneuropathy.