Any suggestions for formulations or use straight down dirt hole or scent post, etc. What about otter concoctions?

Straight otter gland is a good lynx lure.
A good way to use it is in an old caved in beaver bank den or house.Ream out the breather hole,put the gland lure inside and set a 330 over the hole.Lynx are always checking out beaver houses,and the otter gland will make them stick their head in.Can use beaver castor too,but otter gland is better.