…or maybe you are feeding the rats…
Nah, only ever had one, living under the shed. It would pop out and snaffle the suet pellets the birds dropped, but only if we sat very quietly. It disappeared some years ago, probably taken by one of the neighbouring cats.
It’s not unusual to have a hedgehog outside waiting for me to fill the plates up, but sometimes all the plates have been practically licked clean, other times there’s food left, so it’s probably just how many are around at any given time.