Nope, not me.
Most are fairly clear, if not call the manufacturer.
Thing to remember is, those dates are
the date it was bagged, and I don't believe any chicken feed has an expiration date.
TSC tells me they can leave it on the shelf for 6 months. Some folks claim you absolutely should not use any feed older than 2-3 weeks from bagging date, that the nutrients will degrade, which has
some merit but we don't know what the longevity of the efficacy is because the MFG doesn't test it, or they
would put an expiry date on the bags. It's not like drugs or dairy products. The fresher the better, of course, but around here I'm lucky to get less than a month 'old'.
I store my feed in a metal garbage can out in the
coop shed, scratch and flock raiser.
Yep, it gets hot(90+°F) and cold(-15°F) out there, but at least it's protected from rodents and humidity. I scoop to refill the bags in can, laborious but the new bags won't just slide in and I can't pick up a 50 lb bag(without paying for it for day afterwards).