The British Hedgehog Preservation Society on caring for hedgehogs and their website is very useful if you find you also have hedgehogs.
It should 'grow' to double the size.
Then turn it out and knead for a minute or so. Then cut into smaller pieces and shape into hedgehogs by using raisins for eyes and a nose. Then cut into the top with scissors to make the spikes.
Then bake at 200 degrees for about 15 minutes. Sadly, our hedgehogs lost their eyes and noses in the oven but the bread tasted fantastic anyway! Just needed to push them in firmer I think.
I think we might be doing one or two more hedgehog activities over the next week or so.