definition
strict definition
feed store
A retail space primarily selling animal feed, usually in larger quantities for farms or horses, but possibly for pets.
A feed store is a retail space whose primary merchandise is animal feed, usually sold on a large scale to farmers or horse owners, but also possibly for pets.
Pet feed is included even though farmers and horse owners are usual customers. The animal-feed specialization defines the store.
Large-scale sales are common, but the use remains retail. A mandatory minimum purchase quantity is not part of the definition.