During the day they are all in the living room, quite close. We usually have the air purifier going. At night though, they are all in one bedroom. The bedrooms are a good size, but not once you put 3 large cages in! I was going to transfer him into his new cage (the one that won't fit through the bedroom doors) today, but I am extremely ill and George won't be here as he has a 2 hour drive to the vet's to pick up Oscar's medicine, and 2 hours back!It might be the problem I’ve read a lot about it too but I don’t know much about it is there a lot of dust is he quite close to them