hi guys, we have just got two male Piggy's for our family, i have brought a double decker hutch form " bunny business" and it is great, although having read about the problems with the ramp, now my concern is that my lower level goes onto the grass i thought it would be nice for them to have a nibble on the grass, but all the other double Decker's you guys have a floor in the lower level have i made a accommodation blunder!?