picking up the scent

[english-learner]

picking up the scent

C.J.
But that shouldn’t stop you from asking them anyway. Chris?

CHRIS
Has the President had any reaction to Josh on the show?

C.J.
None that I’m aware of.

CHRIS
Do you know--

C.J.
Seriously, that’s it. I’ll get you wheels down time when I’ve got it. [continues to wall through the hallway and is intercepted by Toby]

TOBY
They’re picking up the scent.

C.J.
Billy is. The rest of ‘em are picking up Billy’s scent.

TOBY
Josh is gonna come to the coffee.

C.J.
Keep him cool.


What does " picking up the scent" mean in the context above? I am looking for some help from native speakers. Can you give me some examples on this saying so that I can get a clear picture of it and also know how to use the phrase. Thank you very much!!!

[Tdol]

When dogs are hunting, they pick up the scent of animal and can chase it by following the smell, so when you pick up the scent, you detect something and can move from there towards finding what you're looking for.