evince
Truthmatters
Feds can only promulgate regulations pertaining to commercial animal operations. Interstate commerce authority. Feds do indeed have regulations for humane treatment of animals in confined animal facilities, hog lots, and other commercial enterprises.
Domestic pets are a state matter. I think all 50 states have anti-cruelty laws. How well they're enforced is another matter.
This site outlines the states and their differances.
A few very Red states dont seem to care very much about what people do to animals for fun.