How long do Bison live?
Wild bison live around 15–20 years and captive animals up to 25. Calves are born after a roughly 9.5-month (285 day) gestation, usually a single calf in spring, and wean at 7–8 months. Bison are long-lived and slow to mature, first breeding at 2–3 years, so a herd is a multi-decade enterprise. Their longevity and size mean infrastructure must outlast short-term interest.
What do Bison need?
Bison are hardy grazers needing primarily native grass pasture and hay in winter; they forage in snow that would stop cattle and need far less supplementation. They require a mineral mix, clean water, and parasite and fly control in summer. They do not need heated barns — they are built for cold — but they need space to roam and a low-stress handling plan. A bison-aware vet is needed for calving difficulty, injuries and vaccination, though they are generally robust.
Bison housing and setup
Bison need extensive rangeland or pasture (a small herd realistically needs several hectares, more in dry country) with exceptionally strong perimeter fencing — high-tensile or woven wire at least 1.5–1.8 m, well-braced, because bison lean, rub and test fences and escape is both common and dangerous. A proper crowding tub and chute are mandatory for safe handling; never work bison on foot in the open. Predator protection for calves and a water source that will not freeze complete the setup.
Common mistakes with Bison
Deadliest errors: treating bison like cattle or pets (they are dangerous and cause serious injury and death annually to owners); underbuilt fencing (escapes are frequent, costly and a public hazard); no handling facility (every procedure becomes a rodeo or is skipped); and assuming a standard vet will handle them (find bison-experienced care). Local rules often class bison as exotic/big-game and restrict or ban them near residences.
Beginner mistakes to avoid
- Treating bison as pets — they are dangerous wild animals; casual handling causes injuries and deaths every year.
- Weak fencing — bison escape readily; perimeter must be heavy and well-braced, or you lose the herd and risk the public.
- No handling chute — without a crowding tub and chute, veterinary work becomes unsafe or impossible.
- Ignoring exotic-livestock rules — many areas restrict bison as big-game; verify before acquiring.