BHPS guidelines for hogs that have not been in captivity is 450g to survive hibernation.
If a hog has been in captivity then it is 600g as it will lose weight on release.
If a hedgehog is getting a good food source that it is coming to regularly and in all other ways exhibiting normal behaviour then it is not necessary to rescue them even if they are under 450g.
I would not consider anything over 350g needed rescuing IF all the above is in place.
We need to be very careful about just taking wild animals into captivity without good reason. It is illegal. It is far better to be putting out a regular source of good food throughout the year
Finally when calling the BHPS for advice you will be given standard advice for a potentially very sick hog as it is not possible to diagnose over the phone or on a website like this one. Only once it’s seen a carer will hopefully accurate advice be given.
Carers are all volunteers and while some have training not all do
