Depends on the specie of frog. A poison dart frog have a poison so strong, that it can sometimes kill fully grown humans. If the squirrel tried to bite it, it will stand no chance. read more
But according to the research, it can be established that if they fight, the squirrel will win. No doubt, it’s weight and size and fierceness will make it a winner. I hope you like reading an article on Squirrel vs Chipmunk fight comparison. read more
Bobcat vs. fox (red) - bobcat wins, for the same reasons as it would win against a coyote. It's also stronger than a red fox. Northern pine snake vs. American bullfrog - snake wins. read more