Missy is being really aggressive toward my two year old niece. I'm so worried that she is going to bite her. My niece, Lizzie will pet Missy gently and Missy will show her teeth. Once Lizze tripped over Missy and she snapped at the air. Another time I had to push Missy away with my foot to keep her from biting Lizzie's face after she had screamed. My sister visits a lot with her kids and I babysit them all the time so I really hate putting Missy up so much. Around Missy there is no rough housing with the kids, no running a definitely no screaming... She will show teeth, bark and I'm very sure she will bite if it weren't for me pushing her away or quickly picking the kid up. The problem is mostly with Lizzie she is fine with the boy ages 6,8 and 10. Missy has never cared for very little kids. Please help I don't want Lizzie to get hurt and I really don't know what would happen with Missy if she did.