I was a bit concerned about attracting rats (which is one of the ways I justified buying a trail-cam 🙂 )
I’m glad to say that I’ve only ever recorded cats, foxes, flying insects and hedgehogs at night (the feathers gang take over the day shift).
Probably because we have three cats, and foxes visit frequently throughout the night.
In any case I wouldn’t worry too much about rats in the garden (it’s when they invade the house that they become a concern).
They are intelligent, social animals, clean and good with their young, not really a problem outside (but beware when handling home-made compost that may be contaminated with rat’s urine and a risk of weil’s disease).
If you manage your garden with plenty of untidy areas, log piles etc, hedgehogs should be able to find enough natural food without leaving out that welcome extra if rats actually are a problem.
