if not frozen? I like to use sac oil for Fisher cubbies and any number of other punch hole sets. I have been freezing the whole sacs
but it is a messy operation when milked at a set. Do I need to add a preservative to the squirt bottle that I have been milking the oil into?

If the oil is not contaminated, it will not spoil. I like to dry the oil sacs, then drain them. This way no blood can get in the oil. I've had some for years with no spoilage.

Thanks Paul ! That is just the advice that I was hoping to get.

Good info...BW those empty sacs are great for a change up on the predator line...just be sure to get the sac below ground level...punch hole.