That will provide some relief for manged foxes?

I saw one come out the other day that wasn't as severe as the one I dispatched, but have no doubt it is just a matter of time before it is.

Napalm?

Anything a little less expensive?

Foo Gas.

Drop baits in the area with Ivermectin in them.

Gasoline, powdered laundry soap and a shot of fuel oil isn't that expensive.

Can't believe you just shared that.

That works on lice but I don't know about mange. It might

100% will work on mange mites, however 2 problems:
1). How do you keep the 1st fox along from eating all the baits ? And is there a lethal dose of ivermectin ?
2). There has been some evidence that mange mites can persist in the den in the mild winters we have here.

Hobbie: My father and Grandfather had a fool proof way of dealing with dens near the marsh. Call me for details....

might try Permethrin , it kills the mites that cause mange

powder might work the best dust the den

or mix the liquid like you were treating a dog kennel and be generous with your application at least the cost is low to try a quart which makes about 16 gallons is about 15 dollars at most farm stores.

you could try using oil it might have greater sticking /transfer power from den to fur.

Mange mites only live on the host animal. Not in dirt or grass. They cant survive in either. Ivermec is a pretty safe drug. Takes a tremendous amount to cause trouble. Best thing to do is catch them and give a shot if thats doable. I trapped hard around my house two years in a row when coyote mange got bad. Pelted the good ones and gave a shot to the mangy ones and released them. I cant say for sure I efected the mange problem but it was significantly lower the third year. Still dont see a lot of it.

You say you gave the mangy ones a shot then releasing. Werent you worried about them infecting others before they were cured?

No. I had no place to quarentine them either. Those mites are dead pretty quick once you inject them. Probably safe to other animals in a few hours. Certainly no more than a few days.

BTW it stays in their system about a month

This. I would do the bait thing, 2 oz piece of meat injected with 2 cc of Ivermectin and scatter a few every couple of days for a week should insure they get enough, I think. That is over doing the dosage in hope it gets ingested and recognizing that some will be wasted.
If I trap and inject .5-1cc under the skin at the neck I'd be sure. Or give 1 cc orally.
This will also worm them and keep lice and ticks off for about three months. Disclaimer I am not a vet and the above is only a thing that I would try based on my use of the drug with huting dogs and a discussion with a veterinarian. Caution If the canine has heart worm the dead heart worms resulting from the treatment may stop the heart causing death. Caution if the canine is collie or part collie they may die.

Goldnut, they would just about need to rub each other or lay down together for the mites to transfer. Likely that the mites will be dead before that happens and also likely that without the treatment they would spread the mites. I have read that the mites can live less than about 24 off the animal, maybe less than 12 hours, with out the animals body heat. So there is little likelihood of the mites spreading from a bed or from a dead animal.

Dog dose of Cattle Ivomec is .1 cc per 10 lbs. 20 cc is good for 200 lbs. You must have big fox.

Interesting info here. I just thought that they would be spreading this in the den where they would be close to each other.

Gentlemen, the mites die without heat but the mite eggs can survive longer.

Most likely any treatment of the den would spook them off?