Didn't know that County Yankee Grocer had a beer selection will have to check them out next time I am over. Wife has said we should check them out instead of Hanifords.
Hanifords has an OK selection....but I have seen signs in alot of the places over there, no beer sales on Sunday, which may explain why Thirsty Dawg is closed Sundays. I have seen the sign plastered to the coolers at Hanifords, as well as the coolers at the Shell Station by Walmart. I don't know if this is a "Houlton" thing, as I am sure I have bought beer in Bangor/Portland on a Sunday.
Think it is just new as well, as I don't remember there being signs there before (new as in maybe came into effect Jan.1?)
Craft Beer Cellar in Portland is one store of a larger company, mostly in New England, but they are branching out. Been to one of their bigger stores around Boston, and it had a decent selection, and each store has their own website with their current inventory on hand, which seems to be updated on a pretty regular basis. Here is the one for Portland:
http://craftbeercellar.com/portland/beers.php?sort=b