Wood damaging insects (I can’t remember what you call them, but there are plenty of them, and they are fairly small and grey). I’m not sure if hogs like to eat them. But all you need to do is put a piece of wood, preferably a log, but an old piece of untreated wood is fine, and within the hour, ten will turn up, then an hour later, double that and so on.
We make trap doors for school nature areas, and it’s just a square piece of wood with a wooden knob on top to create a handle, and we place it on the ground. (as it’s for schools, we secure it into the ground, but this isn’t necessary) and as soon as I’ve finished eating my lunch, I come back to find hundreds of them.
You can put a brick down, or anything, and they’ll quickly find their way underneath and set up home in no time.
Also, do hogs eat ladybirds. My rose plants, all four of them, are infested with greenfly, and I have an army of ants controlling them, not eating them, but getting their sticky stuff they leave all over the plants, (controlling them by making sure they keep producing this sticky stuff and moving them to where they want them).
So I’m hoping this infestation is going to attract ladybirds, which the hogs might want to eat perhaps?