Well dog stay with with litters to learn bite inhibition until 8 weeks. (Search in the training section for this topic) Since your dog is young research that. She is teething. Also don't leave the baby anywhere near your dog if its going after her diaper wait until they are both older have some training.
Antlers and marrow bones are good but for older dogs. I would get a puppy kong and some balls for her to play with and chew. You can put peanut butter in the kong to get her interested, you can also freeze it it lasts longer. But since she is young not too much until she is older
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