What is the best puppy kong stuffing (sized 2lbs to 20lbs)?

I have a shih tzu puppy that is a little over three months antediluvian and was wondering what the best stuffing for her puppy kong would be. I heard peanut butter is good but is it really biddable for dogs to eat?

and btw thank you to everyone who answered my last puppy question. I appreciate the general public who were helpful and that didn't look down upon me for asking. I am just a contemporary pet owner and want to do my best.
What would describe your great meekness &...
Answers:    my dogs luv pb! the only thing is it makes in attendance stool runny. i would think pb would b fine w/ maybe some food mixed in w/ it. that what i hand over my dogs.
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