How do you categorize an animal's natural life span? Natural does not equal pain-free.
Madison
Jacqueline
J
Wyeth Research, Chazy, NY, USA.
D035661:Animal Care Committees; D000827:Animal Welfare / Q000592:standards; D000818:Animals; D000830:Animals, Laboratory; D006801:Humans; D008136:Longevity / Q000502:physiology*; D051379:Mice / Q000502:physiology*; D010146:Pain / Q000662:veterinary*