Hi knb2501
It sounds as if she was making a nest to produce her young in. They are sometimes up and about a bit later in the morning if they are nest building. I imagine she will know what your garden is like (re. noise, etc.) and has still chosen to build a nest there, so fingers crossed she will raise her young ones there. I believe they tend to build their nests fairly near to the time their youngsters are due, which might be why you haven’t seen her tonight. You will just need to be careful that your border collie doesn’t bother them. There is some information about pets and hedgehogs:
https://www.hedgehogstreet.org/pets-and-hedgehogs/
Good luck.
