Hi I am new here. Got a question about possible mites in feed for my ducks. I keep the feed in a plastic garbage can with lid. Today I found what was dust from the chicken scratch I recently bought, is actually little clusters of bugs. Very small but large in numbers- inside and outside of the can. Here is a picture. Can anyone tell me what it is?

. I guess I didn't clean it as good as I thought! In the future I will freeze all bags!!!
What is it gonna take to get rid of these bastards??? New food is still in freezer, I will see what the bins look like tomorrow before I decide my next plan of action! Soooooo frustrating