Lady first encounters the rat while she is running happily in the backyard. She sees the rat, growls, and chases after it, causing the rodent to scatter through a hole in the fence. The rat has a bigger role in the climax of the film when it comes back to Jim Dear and Darling's house through the fence hole, while Lady is tied to her doghouse on a rainy night. While Lady barks at the rat, Aunt Sarah tells her to shush. Tramp hears Lady's barks and she tells him that there's a rat in the house. Tramp follows the rat to the baby's room just in time before it can harm the infant. The two engage in a fight until at one point, the rat climbs to the top of the baby's crib, about to kill the infant. Tramp chases the rat off the crib while overturning it by accident, causing the baby to cry. Finall