Hi, I'm kinda new at this. I was wondering if chickens can have blackberries? I would like to put some on the outside of the run between it and the outer fence to help keep the nieghbors dog away, since I can't see that side of the run from the house. There is horse fencing which the nieghbor dog just goes under whenever he feels like it. I thought a blackberry bush olong that whole side might be a good idea. Then they could eat any blackberries that happen to fall into the run. Is this OK?