Shelter officials tell the Fort Worth Star-Telegram 560 animals have been brought to the shelter over the past week. The normal maximum population is 400.
Unhealthy or dangerous animals that aren't placed with rescue groups still are put down but officials so far had managed to spare healthy animals.
Typically in late spring and early summer the shelter sees a population increase because of new litters of puppies and kittens. But officials also say more residents appear to be abandoning animals when they move.