Today I put together a quarantine pen. It’s 20 feet away from other rabbits. I wanted it to be in view of the other rabbits. I often have others feeding the rabbits and didn’t want a rabbit in quarantine to get missed. I left space above for a fan for summer heat, as pictured on the other hutch. Come cold weather I’ll store bagged mixed grass over the rabbits to keep the grass dry and insulate the rabbits from cold and wind. Last winter I lost 1/3 of my dried grass when it got wet and molded.