NuStock and a toddler t-shirt. (you may want to get some runner gloves too. NuStock STINKS)
I don't see why the combo of oils would be bad, but they do the same thing, so I would just stick with the fish oil.
Also, adding Apple Cider Vinegar with the mother, and/or bovine colostrum into their diet would help boost the immune system to fight the Demodex.
"i can explain it to you, but i can't understand it for you."
"When you are dead, you don't know you are dead. It is difficult only for the others.
It is the same with stupid."