For the past couple of weeks when ever I go near the rats I have been itching like crazy to the point I have been thinking I developed allergies to them. But then yesterday I was getting something out of my freezer & discovered that it was covered with 100s of very tiny bugs & now I was covered in them. Took care of that & was itching close after that. Then at somepoint it dawned on that they looked like snake mites. Knowing they weren't I checked the rats, sure enough they are every where. Almost all my rat trays our infested, They are crawling on the walls even. I cleaned all my trays about a week ago & have done feedings/waters a few times since & haven't seen any until yesterday & now they are every where in a short time. I estimate I have 500-600 rats & african soft fur rats at the moment, the room also houses 10 Sugar Gliders. Did some searching on this forum & on fauna forums. From that I already have put a permethrin sprayer in the room (goes off every 15 minutes). I bought a bottle of permethrin 10% concentrate to get the trays & stock tanks. I am unsure how to dilute it down to a safe level. I read in one post on fauna to dilute one cap ful per gallon but I would like to find a more accurate methon like table spoons or what ever. Does any one have thoughts on this? I am also wondering what is the best application method, directly on trays & bedding or spray cotton balls & let them nest in them? Any other tips suggestions will be greatly appreciated. I also need to be able to feed from this colony, can I safely? Also with the gliders being in the room as well I need to treat them so any thoughts there would help. Thanks, -Brad