Hi- I can imagine that is very annoying. It sounds like you have a lovely natural area which is the best thing for the hogs.
We have 2 feeding stations.
1. Plastic storage box with 10cm diameter pipe pushed through the cut out hole in box. It was already a small length size from screwfix so I didn’t need to cut it.
2. Brick built- We can’t see what is going on but the other half built it so the entrance is only big enough for a hedgehog who then would need to turn instantly to the right and walk down to the food.
Have had cats and foxes sniff at both and then walk off.
Good luck!
