I just went out and bought the puppy kongs for my Yorkies. I bought the penut butter and liver spray. They wern't as over joyed as I thought they'd be. I think the rubber smells bad. I'm hoping they start liking them better. But I just learned about the bull penis's (LOL) on YT the other day. Okay bully sticks, and I'm going to give those a try too.
