You wrote this on 14/7, same day, so the answer is: Yes.
Most things are good even after the expiry date, but you could restrict it to adults if you are afraid of something.
My experience with eating things post the "best before" date, is that they may taste funny, but not a big deal. Frozen meat does last until unfrozen, more or less.
Perhaps he couldn't wait any longer and had already devoured the meat.
OP, do update us how it tasted
