Animal welfare groups are calling on Congress to ban owning lions and tigers as pets. Animal groups estimate that ten to 20-thousand large cats are being kept as pets. They say owning a cute tiger cub can be overwhelming when the cat grows up to be 600 pounds and eats 20 pounds of meat a day. There have been numerous incidents of big cats getting loose. Just last week, authorities shot and killed a 425-pound tiger near the Ronald Reagan Presidential Library in Los Angeles. One veterinarian says "the solution is so easy. You just cannot have these animals as pets." Congress has outlawed the selling or shipping of the animals across state lines without permits. But laws around the country vary and some areas have no regulations at all.