In Ice Age 3 there are also some beaver characters. When Manny sets off a false alarm about Peaches, Sid sees a mother beaver and, looking at her tummy, thinks she is pregnant, when she actually isn't. Then. when the Baby Dinos cause chaos in the Playground, the adult beaver tells Sid how badly behaved his kids are. Sid states "I'm a single mother with three kids. I could use a bit of compassion."
Then, one of them, the adult, is chewing wood when Momma Dino arrives. The adult is almost stepped on, but the two of the three toes land on either side of it.