Hi, Well done for weighing the hedgehog and continuing to feed. I have a similar situation where one hedgehog visits and is eating to build itself up to hibernate. The only way I answer this question for my visitor is to use a wildlife camera. I find as soon as hedgehogs stop visiting the rats move in. I would continue to put fresh food and water out until you are sure they have hibernated and even then still leave water and maybe a small amount of food to monitor what is happening.
It is a tricky situation and I would also like to read what others think.
Using a wildlife camera has actually saved me money as I discovered cats were eating the food and I have been able to stop them by making it difficult for them to enter the feeding station.
