Off on you, collars and prevention medication for your dogs if you're using them. "Flea free" drag to get it back to the truck, skin them before they get cold, seven dust or raid, stick it in a trash bag for a few days. I freeze a lot of my pelts in their bags just to let me flesh more all at once, that sure seems to help.

Usually if they have fleas, either the fur will be damaged or thin so they won't bring much, OR that means it's warm enough they won't bring much anyway. Just a thought. You might be in a warm enough climate that the fleas make it.

For what it's worth, they do bail if they get cold. Leave them on the flatbed overnight and they usually vamoose... Assuming you and your pets can avoid the carcasses and the area during.