You use 1 capsule a day mixed in with wet food is best for 4-6 weeks, then back off to 1/2 capsule a day for maintenance. Zoe has been on this for months now and is doing great. The vet recommended this. Here is one of many websites for Cosequin. Again, use the cat capsules as Yorkies are under 10 lb's. Hope this helps.
http://www.entirelypets.com/cosequincats.html