Anchors don't seem to work consistently in pocket dimensions. I have a sheep farm in one, and after leaving for a few minutes I found wool and fertilizer all over the basement floor as if the piping was somehow affected. This happened twice. In an item storage room built in a pocket dimension, items sent through the system via an enderchest/bag have turned up missing. Replaced the anchor in the item room with an unpowered quarry, and so far no problems.
Also, the pens I made out of normal fence don't stop the sheep from leaving. I have seen sheep stuck in a corner in several of the pens, not able to move out of it. Other times there are sheep from one color inside an adjacent pen of a different color, and also the occasional outside all the pens escapee. I am replacing the fences with glass and doors. I hate disorganized sheep. I know the fences from forestry have issues, but I am surprised the normal fencing has some of the same issues. Would it affect the fencing if the wood I made it from came from an identified tree such as apple oak or silver birch?