I don't recommend it. I had 2 neutered male bunnies. I didn't put them in my main coop because I didn't want their feet to get dirty (since the chicken run is bare ground). Instead I put them in my 10' x 10' kennels that were void of chickens & had grass. Rabbits chew on EVERYTHING and they dig. They seemed to be happy in the kennels, but soon their little dig holes become mud puddles. Plus, they chewed on the little houses I had in the kennels - they had rabbit chew blocks & pieces of apple wood but the houses must have been more convenient.
I did put one of my roos in with one of the bunnies for about a month. They got along just fine, until I caught the bunny chewing on the roos wing feathers. My roo (whose not the brightest) just stood there.
Depending on your chickens (they might attack the rabbit), I'd say for a sunny day out it would be fine. I would not do it long term.
My neices are now proud owners of the bunnies....