Directly changes the Animal Welfare Act’s legal definition of “animal” so it explicitly covers both warm‑blooded and cold‑blooded species, calling out groups such as reptiles and fish. The text also spells out specific exclusions (for example, certain birds, laboratory-bred rats and mice, horses not used in research, and some farmed animals) and clarifies that the term “dog” includes all dogs regardless of use (hunting, security, breeding, etc.).

The change broadens the statute’s coverage in ways that could bring additional species and regulated facilities under the Animal Welfare Act’s oversight, compliance, and enforcement requirements while leaving a set of named exclusions in place. The bill does not appropriate funds or create new programs or timelines in the text provided.