My Lil Cha Cha is continuously teasing and infuriating my larger dog Keka(Australian Heeler). Keka is an older dog. Cha-Cha is 14 weeks old. She growls her little Taz growl, jumps on Keka's back, bites her ears, darts at her face, bites and pulls at her lip, bites her ankles, etc.... Keka growls and barks at Cha but never hurts her. Then they go into a barking match back and forth...I know they're playing but I can tell that Keka gets very stressed sometimes and becomes very angry. That's when she'll nip Cha-Cha, but even though Cha will let out a yelp, she always comes right back and starts harassing poor Keka again. The two cats bite Cha's ears and she'll let out a cry but she always comes back for more.... She's like a WILD CHILD, zooming around like she's totally out of control. Does anyone else have this situation? I'm worried that when Cha gets older, bigger and alittle stronger that someone is really going to get hurt... Also the "darting" thing, she does with my face once in awhile. Will Cha-Cha grow out of this and find her ranking in the family or what?