Animal euthanasia It was proposed that the presence of pentobarbital in dog food may have caused dogs to become less responsive to the drug when being euthanized. However, a 2002 FDA study found no dog or cat DNA in the foods they tested, so it was theorized that the drug found in dog food came from euthanized cattle and horses. Furthermore, the level of the drug found in pet food was safe. Animal euthanasia Animal euthanasia (euthanasia from ; "good death") is the act of putting an animal to death or allowing it to die by withholding extreme medical measures. Reasons for
Methods used to study memory supportive tissue unaffected. Research animals are a good substitute for humans because similar principles are assumed to underlie basic mechanisms of brain function. In order to fully understand human memory, cross-species comparisons in neuropsychology are used so that multiple variables can be manipulated. The more experimental control we have, the easier it is to eliminate confounding variables, and better causal conclusions can be made. Although there is no single "ideal" animal model of a human, for each problem of interest there is an animal upon which it can be most conveniently studied. For example, the study of spatial memory has