The meat section at Mega Mart was closed for mixing day or days old meat with "fresh" meat. About 10 days later a spot check at the cheese and cold cuts section revealed mouldy cheese so the whole place was shut down for 3 days which is kind of a last warning.
A word of advice; don't buy any of the packaged fish (I don't mean frozen but the stuff they package like shrimp etc and put in the refregirator next to the the fresh fish section) from the Mega Mart as they do change the date sticker for any unsold items. And that's a fact! Shameful really since they're the most expensive supermarket in Doha and have the highest markups.
What I do is buy all the necessities from the Family Food Center and then the special imports which I can't find there I buy from Mega. These are the imported packaged items they can't fiddle with except for pricing.