PROMAXOL is ARTHRO-IONX plus the LM potencies of each of the individual ingredients. If a condition is severe I start with PROMAXOL and then switch over to ARTHRO-IONX for maintenance. For either one, initially I give a half dose twice daily on the breakfast and supper meals. If you need to you can give one or two additional half doses as needed. With improvement I switch to a whole dose once a day. It is OK if you want to start with ARTHRO-IONX. If after using ARTHRO-IONX for a while, you still need more support then you could add in PROMAXOL.
I would also give PROBIOTICS and OMEGA 3,6,9 to strengthen the body and reduce inflammation. These are avilable from Vetionx as well. With rear-end weakness I also give Cholodin, a B vitamin/ Choline product to nourish the nerves. What kind of food, supplements, and water are you giving? These factors make a difference for certain conditions.