[Sinister]

Hm, I've dealt with aggressive small dogs (pekes and other asian breeds) and gating off sections of the house works. Maybe let them have the guest room or hallway, while Gunner has free run, or rotate to put him in his crate in your room?

 

[Sinister]

Actually, I'd take Juno to a friend's or family's home. She's well-behaved and would be crated.. That's just me..