From the movie Misery (1990):
What do you think I say when I go to the feed store in town? "Now,
Wally, give me a bag of that F-ing pig feed and 10 pounds of that
bitchly cow corn"?
From the context I can guess that a feed store is a store where you buy a food for your livestock. Is my guess correct? Or could a feed store mean a grocer?
Best Answer
Yes, that's exactly what a feed store is.
Note this is specifically food for livestock (horses, cows, pigs, chickens, etc.) and not (necessarily) pets. Food for dogs, cats, birds, fish, gerbils, etc. is sold at a pet store.