Update after I put up the fencing around the broccoli and cauliflower seedlings on Wednesday. Seemed to be working. Watered Friday AM and went biking. All good.
Friday PM half the plants were gone. Critter dug under the fencing. There are a few leaves where it dragged the plants out through the hole it dug. So, this is a critter active during the daytime. Hmmm. I could only bury the fence an inch or two deep. Online, I read bury the fence 10" deep for voles. I was nowhere near that.
Removed the remaining plants from the bed and ordered this trap from Amazon ($18) and got it next day (Saturday). Thanks China. Baited it with a cauliflower seedling. Also, sprinkled some oatmeal over the trap trigger.
On Saturday afternoon, I put the trap in the bed where the broccoli and cauliflower were. Checked it a couple of times a day but no takers. Checked it this morning (Monday) and still nothing. Went out this afternoon and I got 'em. I think it is a vole, based on look and length of the tail. It ate all the cauliflower seedling and oatmeal bait.
I put the trap back out in case there are more. Baited with oatmeal and I'll try various other baits. Online, it suggests to bait with peanut butter for voles. Apparently, peanut butter doesn't work for my voles or they are wise to the rodent traps I baited.