Does your pooch try to take your hand off every time you go to give him a treat? While this type of behavior is unacceptable, it is relatively common. There are some dogs who are naturally gentle but far more that are not. This type of "gentle" behavior is something that every dog should know. However, at the same time, it is important for you to understand that this is not an aggressive behavior. It is simply that your pup needs to learn some manners.
At the same time, you should also know that taking treats from a human hand is not an innate behavior in dogs. No dog automatically knows how to do this, it is something you will need to teach your pup. Training your dog to take treats gently is vital as it will have an impact on every other type of training in which you use treats as a reward.
The idea here is to teach your pup not to try and take your fingers off along with the treat you are trying to give him. The last thing you want is for your dog to behave that way, especially with a small child. You could perhaps get around this problem by tossing his treats to him or placing them on the ground. But, this is only circumventing the problem, it is not fixing it. This may come back to haunt you further down the road.
Once you train your pup to be gentle when taking treats, playing with him and his toys will be a lot more fun for everyone. If you are not comfortable trying to train your pup, consider using a leather glove to protect your hand. The most important thing you need to remember is that it will take time and patience to reach the point at which your pup will always take his treats, toys, and any else you are trying to give gently from your hand.
Try to choose a time of day when your house is quiet and free from distractions for the first few sessions at least. It doesn't take much in the way of supplies for this particular form of training, but you will need:
need a large supply of your pup's favorite soft chewy treats.
Gloves: If you are worried about being bitten.
A clicker: If you have been using clicker training.
Patience: You always need plenty of this.
Time: Again, you need plenty of time to teach this behavior.
One extra thing to keep in mind is that you should not attempt to train your dog when he is aroused, stressed, or hyper, you should only do this when he is nice and calm. Once he has mastered this skill in the quiet, start adding distractions slowly until you can give him a treat, no matter what is going on, without fear of losing a finger.