Officials at the Richardson Animal Shelter are caring for the 5-year-old female orange tabby.
Kim Chapin with Richardson Animal Services said Friday that Skinny is "very sweet" and the largest cat she's seen in her 21 years with the shelter.
City officials received a call about a stray cat in a yard and picked up the animal Sept. 13. Shelter officials thought Skinny was a male until a veterinarian examined the animal Friday.
Chapin says Skinny appears healthy except she is overweight and likely has diabetes. Blood tests were ordered.
Chapin says somebody apparently had been caring for the cat. Officials are not sure who owned the huge kitty.