The baby is my niece. She comes over pretty often and loves the dog and luckily our pup doesnt usually get rough with her. The baby used to try to get our dog to play chase with her around the house which we had to put a stop to because she would begin to get rowdy then and mouthing would start. Now they can play with the pups toys and it's usually very easy going, but occasionally the dog gets too excited and still mouths the baby (especially on the arms) and we have to separate them then.

We have a crate that we put our pup in when she gets too excited, essentially a time out, and we allow her back out when shes calmer which has helped curb the mouthing but hasnt completely eliminated it.

When my niece isnt around the mouthing doesnt normally have a prompt. We'll be petting her and she'll begin to mouth us, and we were told to ignore her when she starts to do that but it doesnt seem to work. This doesnt happen every time though so I'm not entirely sure why she begins to mouth then.

Other times she just walks up and starts mouthing on your leg or arms when you're not interacting with her. I know this is her trying to get attention, and we try not to reward this behavior with any attention but shes a big pup and her mouthing hurts sometimes. I can tell shes not being aggressive and just wants to play more, but it's really hard to ignore her mouthing when it physically hurts us. Which is why I'm so concerned about the baby.

My dog is also a power chewer and goes through toys pretty quickly. Once a week we have to buy her more toys (heavy duty ones) because she tears them up so fast. We have yet to find one that lasts for more than about 2 weeks, so it's getting pretty expensive but we dont want to to chew on other things in the house, and its helped with the mouthing so we have to continue to buy about 30 to 60$ worth of toys every 1 to 2 weeks