"Keener sense" refers to having a heightened or sharper perception or awareness of something.
Sentences with «keener sense»
Cats are equipped with keen senses of smell and hearing. (wideopenpets.com)
I'm usually outgoing, intelligent, with keen sense of humor, interested in the arts, sports (mostly watching), travel, dining. (widowersdatingsite.com)
The dogs of this breed have keen sense for smells and exhibits dominant personality. (puptopia.in)