Not all fussy with the bit horses like bitless.
I rode a mare that was super, super, super fussy with her mouth. I have MS, with a hand tremor, bad balance and bad coordination so I decided she might prefer bitless. Well I had at that time 6-7 bitless systems, and I tried them all on her.
One of the systems was the Micklem bridle with a Scawbrig, side-pull and cross-under alternatives. Well the mare HATED each and every one of them, would not let me keep contact and slung her head around whenever I tried.
The Nurtural cross-under bridle–basically OK until I tried to keep contact, then she would go behind the vertical after a few steps. Turning was fine if I was subtle.
The Dr. Cook–well, every single time I tried to keep contact she went behind the vertical–to me a BIG NO-NO. Turning was fine unless my hand felt too harsh to her, then she “cussed me out.”
The LG bitless system (like the flower wheel bitless), no contact allowed. I tried changing the nose and chin straps on the wheel and I never found one that she would keep contact with. Turning was not as good as with the Dr. Cook or Nurtural cross-under bridles.
My old fashioned Jumping Cavesson bridle (basically a side pull) was basically fine except for contact. Head slinging resulted if I tried to keep contact with it more than a minute or two.
The Spirit cross-under bitless bridle, the release of the cross-under round “straps” was much, much better than my other cross-under bridles, but she did not like contact with it.
The best bitless with her was the Light Rider bitless bridle, a modified Scawbrig. She would let me keep contact for a short while, then she would cuss me out.
I went back to using snaffle bits on this mare. The last few years I rode her (retired now, age 34 or 35) she never told me to stop riding with the bit, just to be careful about it at times.
I came to the conclusion that this mare’s nose was MUCH more sensitive than her sensitive mouth. I could get MUCH better contact with the bit than I ever could with the bitless. She would willingly reach out for contact with the bit, she never went behind the vertical, she would keep contact just fine with the bit, and she “cussed me out” a lot less with the bit than with the bitless bridles I tried.
I had started riding bitless 35 years earlier with the old-fashioned Jumping Cavesson bridle. My first horse, and most horses thereafter would keep contact fine with it, but I did have some exciting rides when the horse wanted to GO!
Most of the horses I tried the cross-under bridles on were fine with them for halting and turning, and most of them would let me keep contact with their nose at least for a little while before telling me that it was too much for them.
If my hands got bad enough so the horses were obviously very unhappy with them and I went back to bitless for a while it would probably be the Light Rider Bitless bridle, though if the horse was super iffy about stopping I would use the cross-under Spirit bridle first. With both of them I would not keep the horse on contact except for brief periods of time.
This long story is to tell you that not all horses with fussy mouths like being ridden on contact in a bitless bridle.
I have recently had very good results with fussy mouthed horses (including one who was trying to chew the stainless steel snaffle bit into microscopic pieces) when I changed to the titanium coated “rainbow” bits which are MUCH CHEAPER than the pure titanium bits. You can find various titanium coated “rainbow” snaffle bits on Ebay, just be sure to type in titanium snaffle bit or you will get page after page of the bits for drills. Not all “rainbow” bits are titanium coated, the cheaper “rainbow” bits tend to be stainless steel. I have found titanium coated “rainbow” snaffles-single-joint, double jointed with a lozenge, mullen mouth and elevator bits, plus some Kimberwicks and Pelhams.
One of my sons suggested that some horses may not like the taste of the chromium in the stainless steel and that may make them fussier than usual. All I know is that I can often get better contact and better results with the titanium coated bits than I can with the stainless steel bits.
Good luck in finding the perfect bitless bridle for your horse. It can be great fun to go bitless trail riding.