Suggestion: I don't know if this will work, but I'd try caging the two little ones (or older chicks, if it's too cool or windy for the little ones) and take them to where you suspect there could be live chicks. Stay with them, of course, but a bit backed away, so they will cheep. I should think that if there are chicks, they will come to the peeping of others.
If you're sure it was a Black Bear, just noise will send it away; they're very timid unless they are faced with losing food, or have been fed by humans in the past. Bang some pans, yell, blow off a few "party poppers." We camp in Black Bear areas all the time; no problems if you NEVER bring food in your tent. Only if there is an open dump, unsecured trashcans, or dumb.... people who feed them to get a photo do they become a problem; otherwise they RUN when they see you. Of course, any mom will defend her cubs, so never get between them.
So very sorry about your chicks. Hope you find more alive.
If you're sure it was a Black Bear, just noise will send it away; they're very timid unless they are faced with losing food, or have been fed by humans in the past. Bang some pans, yell, blow off a few "party poppers." We camp in Black Bear areas all the time; no problems if you NEVER bring food in your tent. Only if there is an open dump, unsecured trashcans, or dumb.... people who feed them to get a photo do they become a problem; otherwise they RUN when they see you. Of course, any mom will defend her cubs, so never get between them.
So very sorry about your chicks. Hope you find more alive.