Could all the stairs to do a poo be aggravating things?!
Twice daily metacam wouldnt be good, longterm other than gastric issues it build up so should be used wisely in older/crf cats.
Accurate dosing is crucial so that label mistake wouldnt have been good if it was for a patient to use the whole bottle, lucky your on for a week before assessment.
Its wonderful stuff tho, and with badly arthritic cats you have to decide whether a longer stiff life is better than a shorter pain free one. I know id always choose to use it.
Dabs, when you say 3ml do you mean 3kg on the dosing syringe?