I just built an 11'x21' flight pen. The sides are 6' tall and the netting is 14' in the center. It has a 4'x6' brick "hut" that is 6' tall with roosts, bottom half has doors that can be closed in cold weather. I have raised ringnecks and silvers in the past. Now raising bobwhites for dog training. Will this pen work for Goldens? There are shrubs and full grass growing in it.