The short answer for a Haflinger owner
Haflingers are famously hardy, long-lived and easy to keep, and their health problems mostly grow out of that thriftiness. The breed was built to work hard on poor alpine forage, so a Haflinger extracts a lot from very little feed. On modern pasture and bagged rations, that efficiency turns into obesity, metabolic strain and laminitis. Day to day, your watch list is weight, feet, and the skin and eyes under all that pale hair and flaxen coat.
Weight and metabolic trouble lead the list
Feel for condition weekly rather than judging by eye: ribs should be felt with light pressure but not seen, and the crest of the neck should stay soft rather than hard and thickened. A hardening crest, fat pads behind the shoulders or over the tailhead, and a horse that gains on air are early warnings of insulin trouble. Spring and autumn grass flushes are the danger windows for a Haflinger, because rich grass on a thrifty metabolism is the classic laminitis recipe. Strip grazing, a grazing muzzle during flushes and a ration built on hay rather than grain keep most Haflingers safe.
Feet and laminitis
Haflingers generally grow strong, hard hoof horn, and barefoot suits many of them well. The foot problem to fear is not weak horn but laminitis: a bounding digital pulse, warmth in the hoof wall, reluctance to turn in a tight circle, or shifting weight from foot to foot while standing all deserve same-day attention. A Haflinger that comes in slightly footsore after a day on new grass is telling you the diet is ahead of the metabolism, not that it needs tougher feet.
Skin, eyes and other points to check
That pale skin under a flaxen mane can sunburn on the muzzle and around the eyes in strong sun, so check pink skin for crusting or sores that do not heal. Haflingers are among the breeds in which growths on the eye and third eyelid are seen more often, so a new lump, persistent weeping or cloudiness in one eye is worth raising at the next vet visit rather than watching indefinitely. Teeth should be checked on schedule too, since a breed that lives long will outlast its molars' grinding surface and may start quidding hay in old age.
When to call the vet
Call promptly for any hint of laminitis, for rapid breathing or distress after a feed change, or if your Haflinger goes off its hay entirely. Colic is less common in this hardy breed but no horse is exempt, and a Haflinger that stops passing droppings or rolls repeatedly needs a vet the same hour. Keeping your Haflinger's weight scores, trim dates and any sore-foot episodes in its KinsLe Pet Passport turns these scattered observations into a record your vet can actually use.