^ Good advice.
However, on a side note, rawhides are NOT good for dogs, especially little Yorkies. They get lodged in their throats and stuck in their intestines. They're not really digestible. And when they get all soggy and gross, it's easy to choke on them. I had a scare with Jackson when he was around 4 months old where he began choking on one and ever since, I haven't allowed them. There's been LOTS of stories on here negative things about rawhides.
Have you tried bully sticks?