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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Bloodhounds follow them:

SCENTS: Bloodhounds follow them
SMELL: Bloodhounds follow it
SCENT: What a bloodhound follows
SCENT: Bloodhound's following
SCENT: Trail followed by bloodhounds.
ONTHESCENT: Following a trail, as a bloodhound