Prisoners have it better than animals in shelters. They get beds, blankets, pillows and a clean cell to stay in.
Most animals have to stay in cold, dirty areas with minimal blankets and no bed. The animal shelters that I have been to recently have had horrid smells with multiple animals in a small area sharing their necessities. Unlike prisoners, animals dont choose to be put in a shelter. Most animals are put in shelters due to being abandoned or getting lost.
Therefore, animals in shelters need cleaner and more pleasant environments, and not to be treated like prisoners.