My girlfriend got her boar a buddy about 4 weeks ago. They got along pretty well for a while but now the older one growls at the younger one and chases him around alot. That bothers her. But what really is driving her crazy is the little one's screaming/whistling. He does it very,very loudly whenever someone comes in the apartment door, in the morning or evening before feeding time, whenever he feels like it, if we take the older one out...just about constantly. Any ideas? They have plenty of room, a 2X5 C&C cage, get fed regularly. The younger one grew up around his piggie family before she got him and they all screamed at hay time. He's just gone above and beyond hay time.