Friends could you please help me out. I have a 13 week old Cane Corso who likes to be up under me 24/7. When Im not home my brother watches her for me and they are good together. When I come home she gets back under me we play and everything. But when my brother comes back in the room she growls at him. They were just together 5 min before but when I get home she wants no part of him. She has growled at him since the moment I got her but only when im around. Why is that and how do I stop this. I have joint custody of my daughter whom is 5 years old and she growled at her once too. Not an agressive growl so I told her no she stops but if they come back again and they walk slow. She growls. Help please.