Q.Deer Processing & Food Safety
How do I know if venison has gone bad?
A.
Bad venison has an off smell (sour, ammonia-like, or strongly putrid), sticky or slimy texture, and a green-grey color rather than the deep red of fresh meat. If any of those signs are present, discard the meat. Surface discoloration alone (oxidation) isn't necessarily spoilage — but combined with smell or texture changes, it is.
Trust your nose first. Properly stored venison should smell only like meat, not sour or ammonia. Surface oxidation (a brown or grey film on cut surfaces) is normal after exposure to air; it's safe if there's no off smell.
When in doubt, throw it out — venison spoilage tracks the same rules as beef and pork.