That is a pretty nice indoor setup. I have actually thought about making an indoor, above-ground pen Amazon. Just never did.

Anyway, if you're using Ivomec (1%) to treat demodex, the dosage is 600 mcg./kg ORALLY and DAILY. The breakdown for both types of mange, in ccs is as follows:

Sarcoptic/Scabes (200 mcg./kg, orally or Sub-Q ev. 2 wks)
Give .1 cc for a 10 lb dog.
Give .2 cc for a 20 lb dog.
Give .3 cc for a 30 lb dog.
Give .4 cc for a 40 lb dog.
Give .5 cc for a 50 lb dog.
Etc.

Demodex (600 mcg./kg, orally + daily, for 30 days)
Give .3 cc for a 10 lb dog.
Give .6 cc for a 20 lb dog.
Give .9 cc for a 30 lb dog.
Give 1.2 cc for a 40 lb dog.
Give 1.5 cc for a 50 lb dog.
Etc.

Remember, for sarcoptic mange the dosage is moderate, and in two applications spaced two weeks apart. For demodex the dosage is high and DAILY ... until cleared and you get two negative skin scrapings in a row. You can use Ivomec concurrently w/ Amitraz, or by itself, for demodex. You should use antibiotics (like cephalexen) if the demodex is severe. You do not want to use cortico-steroids if your dog has demodex, as it lowers the immune response.

Hope this helps,

Jack