Clara's Window

So here's my question.

The deer, thwarted by the fencing I recently installed around the vegetable gardens, are now attacking my flower beds. So I went out and got a bottle of deer deterrent. And on its list of ingredients is coyote urine.

So my question is, how exactly do they extract this urine?

Exactly. It's a quandary. Anybody out there happen to work in the coyote urine-extraction business and wish to enlighten us?