Last week we discovered about 5 infant bunnies burrowed in my front yard. We managed to keep their burrow safe and they stayed in it. We saw mom, we think, very late one night across the street, so we went inside hoping she'd come feed her babies. It's been several days and she has not come back. We did the yarn and stick test, and when checked neither had been disturbed. They're out of their burrow now, eyes open, often cuddling each other. They do go back in and out of their burrow. They seem too tiny to set free to survive on their own. We have a small raised garden bed surrounding them for now. It's only a few inches above ground, mom was able to get in and out, babies were not, so we thought it best and safe. We have never handled the babies. They seem healthy, but are orphaned. We live in Kane County. What should we do with these babies?