Does your dog sit next to you at the table begging for your dinner instead of eating his own? Have you ever made yourself a sandwich and left it on the counter only to find your pup has snatched it when you weren't looking? Dogs are notorious scavengers, the urge to behave like this is deeply embedded in their ancestry. But, this doesn't necessarily mean it’s an acceptable behavior.
At the same time, if you have ever given your pup a "treat" in the form of tidbits from your plate or food that is left where he can get to it, you have only succeeded in reinforcing the fact he is getting rewarded (in the form of food) for this type of behavior. While it can be challenging to train your pup not to eat human food, it is not impossible.
Training your dog not to eat human food falls under the general training, but can be very challenging. The basic command you must train your dog to obey is 'leave it' or your own version. No matter what command you finally settle on, be sure you always use the exact same wording and that you do so with a firm voice that tells your pup you mean business and expect him to obey.
As with most commands you train your dog to obey, this one can take a few weeks for your pup to learn he must do as he is told. But once he learns it, you should find that not only does he stop begging, but in most cases, he will ignore foods that are left within his reach (at least for a while, as any dog will give in to the temptation from time to time).
Getting started can be a bit challenging, but you have to begin somewhere. Be sure to have plenty of his favorite dog treats on hand to reward your furry friend for getting things right. You may also need to lay in a supply of top quality dog food if you are not already feeding your pup the best, to ensure his nutritional needs are being met. Beyond this, you will need his favorite human food, a quiet place to work, and an ample supply of patience.