I have a 10 yr old Sheltie with advanced elbow arthritis. I have posted on the illness discussion and received helpful advice. She is on many pain meds and I am looking into CBD oil. My daughter bought a 30 ml bottle (quite expensive) and she did not like the dry mouth it gave her. I would like to try it for Missy for her pain, but have no clue how much to give her. My vet said he has no experience with it. She is 22 lbs. How many ml should I give for her pain which is not yet severe, but getting to that point. Thank you.