Yup agree with above. The first time I got the council round he said 'if you feed birds you feed rats' I ignored his advice. The second time he came I had to admit he was right. So I stopped feeding the birds (but haven't noticed a decline.) Rats like stability, so if you turn the heap regularly, and don't put tempting bits in the bin, they'll move on. I have dalek bins and always kick them as I go by ( also encourage visitors to do same). If you contact your council, they should be able to advise on, or organise FOC eradication. Creepy, but it can be dealt with.