Bloodhound is a mutation that raises your senses and track, by giving you a funny looking nose.
Bloodhound is located in a very easy place - simply fall down the waterfall in mountain pass.
This mutation grants:
Not only does Bloodhound grant you +2 senses, but also +4 to a very useful skill, track. In total, since track depends solely on senses, you gain +6 to the skill.
Takes up a mutation slot. If you don't do tracking contracts, or don't have many skills that depend on senses, there are much better options to fill up your precious mutation slots.