Insect and Spider Identification: My spider eggs hatched!!, 3 by HeatherJoy

HeatherJoy wrote:
I posted a photo of a spider egg sac a while back. They finally hatched and I'm dying to know what they are. I looked up "black widow spiderlings" but there were so many photos that looked different, I couldn't get a definitive answer. I'm in Sacramento, CA and the eggs hatched today or yesterday. To me, they look like orb weavers. If they are, I'll let them go. If they're not and they're black widows, I'm going to humanely dispose of them. Can anyone tell what they are? If I need to keep them longer to find out what they are, what should I feed them? Thanks :-)