It's great for their coat, but it does have sugar and salt, so you don't want to overdo it. It can also be constipating to some dogs, or give others the runs if they eat too much. If you're using the puppy Kong (I think I remember that's what you bought) it should be okay, just keep an eye on her and adjust her food intake accordingly to make sure she's not getting more sugar and salt in her treats or overeating. Peanut butter is calorie dense, but while she's a puppy that shouldn't be a big problem. You have to watch it after they're grown, though, to keep from ending up with a portly pooch.