Hotel heiress Paris Hilton has been attacked by an animal rights group for reportedly dumping her pampered dog Tinkerbell - simply because she grew too big.

Tinkerbell is said to have grown past her ideal weight of 3.5 pounds, apparently prompting Hilton to leave the dog with her mother Kathy while she pampers a smaller Chihuahua named Bambi.

Her alleged actions have angered the People For The Ethical Treatment Of Animals, whose spokesman says, "It's a pity that Paris' heart doesn't match her pocketbook. Animals shouldn't be disposed of like last season's trendy handbag."