Thanks both of you. I'm not planning on quitting lessons, considering going down to twice a month though instead of weekly. Nav really is the kind of horse who needs a job though, he is so looky - J described him as "being a tourist" during our lesson yesterday, which is a funny way to say it but it's true, he's always looking for things to see around him. When I ask him to do harder things, such as what we work on in lessons, he really has to focus and does a lot better. So I will definitely keep up the lessons, just maybe on a lower scale. J also said that she believes Nav has the potential to go to 1st level, with regular riding, so that was nice to hear. I'd like to move him up and learn some more challenging movements eventually.
The only thing from yesterday that I forgot to write about here: Bit placement. I mentioned that the franken-bridle helps so the bit isn't so low and the cheekpieces don't gape anymore, but J actually put the bit up even higher. Because it is apparently a slightly too large bit, so the link in the middle was not at an appropriate place, and the "arms" of the bit were able to slide into his mouth too easily. She also said that when a bit is too low, the horse can tend to get heavy because he's reaching for something to hold onto. She adjusted it for him after I had gotten on, so I didn't get a good look at the placement until today when I tacked up. And honestly, I feel bad about how tight the bit seemed! I don't think I've ever had a bit so high on any horse I've ridden. I know that some people do the two wrinkle rule, and that's what I was originally taught, but lately I've had him a lot looser (mainly due to not being able to put it up at all) so this was a big change. I would like to be able to trust my instructor, since she's a professional and a very good rider, and of course because I'm paying her to teach me, but having the bit so high feels very wrong to me. Does anyone have any opinions on this? I got a few pictures:
From the front, you can see how the bit sticks out on either side because it is about a half inch too big (it is 6 inches):
Left and right sides:
And just for comparison, this is where we had been:
Maybe it's just surprising because I'm used to it being much lower, but I don't know. Nav is stoic so he didn't seem bothered but I don't want to hurt him.
We had a nice ride though, worked a little bit on transitions within trot, and then just did a tiny bit of canter. But most of our ride today was a nice little hack down the road. It was windy again so the horses we passed by were super fresh, running around and playing with each other. Of course Nav did very well and didn't get upset by the antics. :) I gave him a bunch of treats before letting him go back to his field, and then brought all of my tack and tall boots home to clean since it will probably be Monday before I go out again.
Oh, and also just got Nav's biotin supplement in the mail! He got it regularly while we were back home, and I think it did some good for his hooves and coat, so I figured since they get fed in the stalls daily it would be really easy to start getting that back into his diet.