the once a week dose for ivermectin is for life if you have strongyloides (icus Protocol), which you say you don't have. I will take a once a month dose of moxidectin with no other drugs for july august and September. this will be my 14th ,15th and 16th month of protocol. I would recommend looking into vet treatments for hard to eliminate mites in dogs or cats as they would have the most info. I will talk to my mom tomorrow as I will become a grandpa and she will be a great grandma for the first time. IF I REMEMBER I WILL ASK HER ABOUT YOUR MITE PROBLEM. I ONLY DID ICUS PROTOCOL FOR THE FIRST 6 MONTHS, I been doing my moms farm vet protocol for the last 7 months and it changed again last month.