The court looks whether the marks are visually, aurally or conceptually similar to each other. Visually the logos are quite different. The beaver is a line drawing in black and white, the squirrel family includes colour.
Actually, the only visual similarity between the involved animals in the logos are large incisors and a large tail. Conceptually it is clear that both logos involve rodents. That is not enough, however, to constitute trademark infringement. The court rejects the claim.