According to Jim - Season 1 Episode 3

Cheryl's 15 year-old cat Mr. Feeney dies and she wants Jim to bury it on the backyard, but Jim wants to go to the Bears game with Dana and Andy. He sticks the cat in the garage freezer, planning on burying it after the game, but Cheryl finds out before he comes home. She is hurt that Jim doesn't listen to her nor care about a cat that has been longer with her than anything in her life. Jim makes it up to her by getting the family a dog and giving her cat a proper burial in the backyard.