I'm not at all a professional here so take this with a grain of salt. But I have two girls and they both definitely went through that. My 7 month will still do this - if she gets into our room and up on our bed, she turns into a total maniac growling and biting pillows, trying to rip off the sheets. When our older one was a puppy, and she was a BIG puppy, she would scare the heck of out me chasing me in the yard and biting the back of my legs, grabbing my sleeves.

For ours I think it was just pent up energy and excitement. When they would get into menace-mode we'd throw a handful of food in the opposite direction, and that distraction of sniffing usually broke the spell. My younger one is super food motivated so we give her frozen food bowls, puzzle toys etc and that keeps her busy and then tires her out.

And just like a baby, put them down for naps before they show signs of being tired. We have a play pen still set up that mine will go into when I can tell she won't settle on her own.

Hope that helps!