Deepwood Weald What is this, a crossover episode?

As expected, the wolf has a higher advantage of retaliation than Mr. Peanut Butter can ever prepare for. She moves fast and forward and he hardly hears her until her teeth chomp down on his tail. Immediately, he yelps and jerks forward, trying to get free at the same time as he swings back and tries to snap at his assailant but she’s moved out of reach by then.
 
Mr. Peanut Butter curls his tail inward and spins around, trying to see the damage done but tucked between his legs doesn’t help. He puts space between them next, turning to see if she’s coming back for him. “WHY!” he yells before turning back and attempting to run away.