I asked my mom (who has a 1 yr old yorkie) whether to get a dental bone for ralfie and her eyes widened and she said NOOOOO
hehe apparently she had the same diarrhea episode you experienced. I like the small rawhide chews (they're controversial, I supervise and take them away when they begin to get shredded and nasty) and also the all natural bully sticks (they are 100% digestible). His favorite is a rawhide shaped like a shoe- its the only shoe I encourage him to play with! Hope this helps!