The American Society for the Prevention of Cruelty to Animals (ASPCA) is a nonprofit organization that helps to protect the rights of animals. They have various programs and shelters, as well as many supporters and volunteers, that help keep animals safe.
The ASPCA teaches pet owners how to properly care for their animals, including grooming and training them in calm, safe manners. They also have legal authority to investigate crimes against animals, as well as make arrests for them.
If someone believes an animal is being mistreated by its owner, they can inform the ASPCA who will ask a number of questions and investigate the matter further. If they believe it is animal abuse, they will take the appropriate legal action.