Dog Nurses Squirrel Back to Health.

From the website:

Finnegan the squirrel was found injured and malnourished in the Seattle area in September 2005, when he was only a few days old. He was brought to Debby Cantlon, who had a reputation for taking in sick and injured animals. Ms. Cantlon reported that her pregnant Papillon dog, Mademoiselle Giselle, repeatedly dragged the kennel in which Finnegan was being cared for across the house and deposited it next to her own doggie bed. After Mademoiselle Giselle gave birth to her pups, she continued to care for Finnegan, even allowing him to nurse with her own.

Lots more strange (interspecies) animal friends: Link – via Bits & Pieces