Pound seizure is when an animal shelter sells or gives its unwanted, live animals to laboratories, to be used for experiments or product testing.
Pound seizure was originally required by law in some states, but most of those states have since modified or repealed the law. Some states now ban the practice while others require pound seizure of their publicly funded shelters. The Animal Welfare Act, a federal law, requires a holding period of at least five days before an animal can be turned over to a laboratory.
To check whether pound seizure is allowed, required or banned in your state, visit this site from the American Anti-Vivisection Society.