So i started my flock this year, 13 hens and a rooster.. I couldn't be more happy. .they're SOOO happy, healthy, and SOOO SPOILED!!! anyway. .they free range around the yard, (over an acre) and i just built/made flower beds all around the house. . i put down mulch and it looks great. .HOWEVER, they get in the beds and scratch the hell out of them, throwing the mulch all into the grass. .how do i keep them out of the mulch beds? any advice??