I'm guilty of this. I call my BP my baby, my fatty, and my pretty girl, all in a baby voice. I talk to her about how much weight she's gaining, or how she needs to shed, or anything in between. My Cali king, on the other hand, I just calmly tell not to bite me and to be a good girl... and after she sheds I tell her how pretty she is, of course.
I do the same thing with all of my pets except for the rodents, oddly enough. Hermit crabs make good conversational partners.