If you don't think you're going to be able to effectively manage his ulcers so soon after diagnosis and treatment then why is he even going to the show??
Plus from what I have read you have just started riding him. After a month or so off the horse needs a lot more than a week of light riding to get his fitness up before you're expecting him to do 3 tests in one day. I wouldn't even request that of a fit horse!!
If you must take Cin to the show then I would say just do one test and do it well and then take him home. Personally, I wouldn't even put the horse in the trailer if I was so worried about his ulcers.
Good luck!! And I hope you can make the decision that is best for your horse.
I think we are miscommunicating. I think I can effectively control his ulcer issues and his anxiety levels (my vet's assistant has helped me with this) I just want to know from other people who have experience in showing horses with ulcer/acid reflux issues any tips or tricks that they have. This is our first show since he had treatment and I want to make sure I haven't missed anything with my plan.
And I haven't just started RIDING him, I've recently started WORKING him. My idea of WORKING him is to do exercises and drills aimed at a certain goal be it strengthening something, getting circles more round, going into the bridle, etc. Dressage stuff. These things I haven't done as much lately.
We HAVE done riding. Walking on trails, playing on hills...things that Cinny thinks of as fun and games, that HE enjoys doing and that keep him happy and relaxed. Canters across the fields (his very favorite thing), trotting along the river, playing on hills, walking through the woods. Pretty much all done with his training halter and at his own relaxed stride and pace.
So I don't really consider him "not fit" to show, he hasn't lost any of his fitness. If anything his brain is more into it and he's really wanting to work now and relaxing with it. I'm not worried about the amount of tests, we have done more than 3 at other schooling shows in the past with no problems, he usually enjoys getting out there and performing with the exception of our last show. If they were 1st level or above, I wouldn't do as many, but training level doesn't seem to phase him at all. He's used to going on 2-4 hour trail rides 1 or more times a week, 5 hour clinics (with only a 15 minute break) so I think he will be ok.