Afternoon, everyone. Been enjoying this game since last year but I'll get right to the point. I was lucky enough to find some terra preta while out exploring, so I figured now would be as good a time as any to start up my garden. I built a dry stone fence around some space near my cottage (plus another nearby for animals) and planted some flax there, but now I'm running into a problem: Despite being completely fenced in, hares keep appearing in my garden and eating my crops.
I've attached a couple screenshots of my garden below for anyone who cares to take a look. My best guess is all the blank space for grass to grow is what allows the hares to spawn; I dug out some channels to put water in, once I've got planks to make buckets, plus I just don't have enough terra preta to fill out all the farmland I want just yet. I'm not sure, though, so I wanted to see if anyone can tell what the problem is. Thanks in advance!
EDIT: Oh, right, I forgot to mention that I'm playing on v1.15.0-rc.4, in case that's relevant.