This hog needs to be seen by an expert without delay as it should not be out in the day. It may well be carrying a heavy worm burden. The BHPS offers the following advice:
If you have found a hedgehog you are concerned about please use gardening gloves to collect it up, bring it indoors and put it in a high sided cardboard box with an old towel or fleece in the bottom for the hedgehog to hide under.
Fill a hot water bottle so that when it is wrapped in a towel there is a nice gentle heat coming through and put that in the bottom of the box with the hedgehog, ensuring it has room to get off the bottle and making sure the bottle is kept warm (if allowed to go cold it will do more harm than good). Put the box somewhere quiet.
Offer meaty cat or dog food and fresh water then call us as soon as possible on 01584 890 801 for further advice and the numbers of local contacts. Note that out of office hours there is an answerphone, if you have a hedgehog, please press option 1 and listen to the emergency numbers, these volunteers are not representatives of BHPS but they will give you advice and numbers of local contacts.