Join Date: Feb 2012
Location: In my own little world;)
I've used / use both depending on the situation or horse. It's hard for me to explain in writing, so bare with me.
I use the sidepull on horses that have a bad "taste" for any bit (i.e. Someone was heavy handed / used the wrong bit, etc.) to get them used to someone with quiet hand asking for the ask / release without them fighting it by attacking the bit. Ex: a horse HATED any bit, roller, copper, sweet iron, german snaffle, dee, etc. even with real quiet hands any time there was the slightest contact with the bit she's try to chew it to pieces, try to flip it, and so on. So I'd spend more time trying to get her attention away from that, than what I wanted to work on. I switched to a side pull, and within a few rides, she had basically relearned the pressure / release without having the bit as a distraction. After that I was able to move back to a snaffle with A LOT less issues. I then tried a bosal after all that, and she didn't care for it.
Another horse, a side pull just wasn't getting the message thru his thick skull to give into the pressure, so I moved to a bosal. Worked GREAT, he needed the pressure on his chin to get the message rather than the top of his nose (whatever that bone is called, can't remember right now).
All the horses I've used either on, transition nicely into the snaffle and then the curb.
"Just because I don't do things your way, doesn't mean I don't have a clue"