What animal eats a red squirrel?

No. Red squirrels and grey squirrels are from the same family. that doesn't mean a red squirrel can have grey squirrel babies, or the opposite. Red squirrels could get angry at grey squirrels, I mean, you could attack anyone or anything. But at all, it's unlikely that you would see a grey squirrel with a red squirrel. they have different habitats. If food is scarce in an area of cohabitation, the Gray will chase the Reds from the area because of their larger size.