Blackbird parental duties

[Pugwash]

From an observation this Morning, is this behavior to be expected..
Being unable to attempt any rescue attempt nor know the eventual fate of a bird caught by a cat. The cat had caught a bird near a feeding table (I assume to be a youngish Blackbird), the cat, as they do releasing and recapturing the bird. What I noticed was a male Blackbird in the vicinity, far from flying away from danger, it appeared to be edging closer and closer to the cat which I took to be an attempt at distraction to give a chance to young to escape. Later (maybe the same blackbird) a male was observered at the feeding table with a youngish bird - was it standing guard?