Hi - don't know if the little mouse survived... but if it has there are lots you can do. I have saved many a mouse, some badly injured. As there metabolism is so fast they can mend very quickly. Visit the 'www.allaboutmice.co.uk' website, which is full of useful info. Also the vet wil help - I believe they have to treat all wild animals free of charge, but check re charges first. Another option is to contact a animal rescue (RAC will give you your local tel numbers) who will take it in for you, but check if they will take mice in. Regarding food .. put fresh water, nuts, grass, porriage oats, rice crispies or weatabix etc. I wouldn't let anything suffer, but the poor little thing deserves a chance and as I said I have had some injured mice that have shocked me at how fast they have got better, but even if it does die, you will have done your best and gave it a chance and a quiet warm place. Good luck