My Sasha is like that too right now. She's on the wrong side of every cabinet door, or the fridge, or whatever (thankfully, she hasn't tried the oven yet, but the microwave is fair game). This morning, she and Belle (my 45-50 lb dog -- see my sig) were running and jumping, playing on the bed (and I was still in it!) Sasha kept attacking her head and biting Belle's throat. Belle showed marvelous restraint, thankfully, and just rolled on the kitten (like she smelled bad or something) and didn't try to bite or anything. The kitten is always after the dog's tail, too. Since Belle's a setter mix, she has that beautiful long hair on her tail...just more tempting than any cat toy. Unfortunately, Sasha has also recently developed a fascination for the potting mix my houseplants are in...more cleaning for me. Hopefully she'll outgrow the craziness soon.