I think you need to find your own way to communicate with your horse.
To quote Mr. Parelli... "And the crowd goes wild!!!" Very well put.
I read on the FuglyHorseoftheDay blog, about how one woman wrote to Pat Parelli about her appy. The horse was quite dominant and was biting her, to the point where he was leaving big bruises on her. Parelli's answer - give him a carrot, make friends with him and then he will stop biting you.
Dear Lord... where's that eye rolling smiley???
Although I do see the direction of this thread and everyone is entitled to his/her opinion I can see how using The parelli program combined with other NH training can be confusing to the horse. The Parelli games/levels build upon each other. For example the seven games are learned in an order 1-7 , you do them in order and get really good at doing them then you mix them up. Level 1 tasks are before Level 2 task etc...The exercises build upon each other until you have success in all areas-Savvys. I believe that it is the same with other programs ...( just as an example) Clinton Anderson has gaining respect on the ground 1 & 2 .You should follow the exercises in order on 1 before jumping to 2. If you pick and chose just randomly and don't have a clear outline of what it is you want to accomplish you are being confusing to the horse.
An excellent point. Any rider/trainer/handler does need to build a foundation before moving up, but that is true for any training methodology, whether Parelli, Anderson, or Classical Dressage. There are steps to follow, and, by and large, most roads lead to Rome. Any issues here are the result, not of mixing nethods, but of asking a horse for too much, too soon. There's being mixed up within a method, and there's mixing and matching entire components of different methods. Mixing and matching can work well as long as your horse is properly prepared, mentally and physically, for what you are asking of him. I do recognize, however, the benefits of having a well structured, step-by-step system. People (in general) in my experience like processes to be laid out in a systematic way. (Actually, for shunning all predatory activity, something that systematic seems a little out of character for the Parelli's... aren't predators supposed to have highly systematic goals and methods or something?) There's a reason why instructions come in the box for gadgets with moving parts. The Parelli's and others have provided a set of "instructions" for dealing with horses in general for anyone who wishes to take advantage of it. The thing is... a horse is not a stereo, an internal combustion engine, or Barbie's Dream House. With these things, if you do one thing not quite according to the instructions, your (insert item here) will not function at all. A horse is a little different, IMHO. There are a dozen ways to get the end result, but skipping any steps is what sets anyone and any horse up for trouble.