It's not easy to get a dog that is programmed to dig to stop but with a
bit of consistent training and modifications, we have been successful in this adventure.
If you have a solid 1 - 2 years
of consistent training under your belt, have added considerable mass and strength to your overall frame and still notice that your arms aren't growing in proportion to everything else, THEN a specialized approach can make sense.
Because animals respond well to this
sort of consistent training, they are capable of understanding what is expected of them, what is deemed «good» behavior, and which behaviors are unacceptable.
It takes weeks, months and even
years of consistent training to build up a truly impressive set of arms, and you need to be patient and take things one step at a time.
The difference from week to week will be minor, but when you extrapolate it over months and years
of consistent training, you'll be amazed by the gains you're able to make.