After finding out EXACTLY what bully sticks were, my husband refused to allow them in the house for any of our pets to chew on.... and I would have to agree. EWWWW.
Petsmart sells sterilized bones - most are prestuffed with a peanut buttery filling, or beef. They are individually wrapped and sell for about $4.99 each. These things last for months with a German Shephard and Rottie. I can see them lasting for a year or more with a Yorkie. I buy two of the peanut buttery ones - one for Cinamin and one for Matthias. I have to keep them seperated because Cinamin is very picky - if another dog even breathes on her food or bones, she wont' touch it. Anyway, these bones are great! I highly recommend them!
Here is a link to one on the Petsmart website - this one is mint flavored filled for that fresh breath feeling! heheheh Cinamin didn't like that so we stuck with the peanut butter (the beef juices stain carpet).
http://www.petsmart.com/global/produ...=1136340106334