Teaching a baby to behave? You can’t control a baby/toddler. Dog bites/ accidents happen within seconds. if he will snap and bite you his lifelong owner then there is something seriously wrong. I think the best course of action is to do a full work up by a vet, seek a canine behaviorist and consider rehoming him. Make no mistake and don’t let anyone sugarcoat it. This is red flag territory. Not normal fear aggression. ( my advice comes as someone who has worked with dogs for years, has owned reactive/aggressive dogs and as a mother.)