It takes two people to do the cleaning Zoo and I did. I used an array of dental instruments .I found that the endodontic spoon worked well with the small ones. One scruffs while the other cleans and examines. Any profound calculus subgingivally with swollen purple gums SHOULD have a periodontal cleaning with anesthesia. My vet actually helps me with mine. He is open to any reasonable ideas concerning the ferrets. He sees very few aside from mine, and has been most accommodating. He sc ruffed some of mine that were in for distemper shots, and I used some of my dental instruments. It worked very well. Green chunks of calculus came off two of mine that I took in. I do NOT urge people unfamiliar with dental instruments or cleaning teeth to try this on a tiny ferret. [Posted in FML 5531]