I have a 6 month old Zoe that we have had for about a month now. We decided to get another 6 month old kitten just like Zoe her name is Halle. Well we are not sure what to do. Zoe is acting very teritorial (sp?) hissing and batting Halle on the head. Halle just ignores her, Zoe will back her into a corner and hiss and growl. When we pick her up she hisses and growls at us. Any ideas on what to do?