Good question! The answer for us is, it depends.
Taz goes in a french link snaffle 90% of the time at home. It is what he does dressage in and trains in mostly now that I found out that he likes it. I did his first few distance rides last year in a mullen mouth rubber coated snaffle, as that is what he came to me with, and I assumed that he wouldn’t tolerate anything more than that.
Ha! The groom that packed his stuff at the trainer’s sent the wrong bridle with him. Not her fault, as the trainer didn’t make it clear what she was to send, but nonetheless, I found out that he pulled a lot in that bit because it wasn’t at all the right bit for him! :lol:
So, I bought a tom thumb french link snaffle pelham for Sam to try, and Taz came back from a brief layup right as I bought it and I thought “hey, why not try this?!”
Well, for a ride, it is close to perfect. For the first loop, I use the bottom rings – the shanks are short, but I need a little “whoa” – for the second loop, I can usually go to the snaffle ring or to his french link snaffle bridle.
My training partner rides in an s-hack most of the time and always on the second loop, and I like it, but I’m afraid Taz’s reaction would be :lol: :eek: :lol: at me. 
The only time I’ve been able to use his sidepull on his endurance bridle is on an LD that had 85% of the ride totally under water. He so didn’t care then that it was all I needed.
Maybe this year at some point we can try a hack and see how it goes? Ok, maybe not. I do want to live to see the end of the season . . .
:lol:
Libby