Teach Any Dog or Puppy to Be Gentle -- Take Treats Nicely

If your dog is biting too hard, make sure to not release the treat.
You will get bit and scratched on your hand, but it’s a sacrifice you have to make to teach your dog to have a soft mouth.
Cover the treat with your thumb so your dog can’t get to it.
I usually wait for them to lick my fingers and then release the treat.
If they are jumping at the hand or biting at the hand I pull my hand away.
There is no need to give a command because you want your dog to do this every time without being told to be gentle.
For additional practice, you can hand-feed your dog their dinner.