I went out and sat in a high seat last night, and as I made my way to it through the thicket where it's located, I noticed, along with a lot of trails through the grass and flattened areas under the trees, that in many places the stems of the cow parsley had been chewed through.
The plants are now growing about 3' 6" high, and had been bitten off around 18" from the ground. It didn't look like random browsing, but as though it had been deliberately sought out as a delicacy!
If my phone hadn't been flat (note to self: check before going out) I'd have taken some photos, but I've set up a camera overlooking a patch of the stuff to see if it will answer my question, which -if you've been kind enough to read this far- is...
Is this characteristic of roe and/or muntjac feeding? (Both are found regularly in this spot.)