Where to find "smart chicken"?
If you're just looking for air-chilled chicken, Bell & Evans (available nearly everywhere, certainly at most Shaw's) has an air-chilled variety. As greygarious mentioned, if you want this particular brand, Big Y sells it. No sense in driving all the way out just for that, though. Hit the local Star Market "natural meats" counter and get the Bell & Evans air-chilled chicken.
Not sure about "Smart Chicken" brand but I may have seen it at the Golden Goose Mkt on Commercial St.
My favorite chicken locally is Misty Knolls from VT. Savenor's Mkt sells it for $4/lb and I saw it for sale at a farm in VT that raises and sells it's own veggies, pork and beef and MK chix for $3.60/lb. Not a big markup to buy from Savenors's.
Giannone chickens from Quebec are also very good.