Dog acting out 😩

Janice
So I have a "older" puppy he's 13 weeks and he's a bull terrier (target dog) I've noticed him always trying to bite my stomach like outside of nipping at my arms he nips at my belly but it's gotten out of control lately and so I'm just curious have any fur moms noticed a bit of "jealousy" from your pets since you've been pregnant? My pit when we had him LOVEDmy belly and was always so gentle with it this one wants to rip the baby out and use he rasa chew toy! We've been taking him to obedience school but apparently he's more bullheaded about"leave it" than any other command 😪 just feeling beated and defeatedÂ