I just went through something similar. My horse was off and on lame for over a year actually. It's interesting because when I called my vet out, he was sound so she checked him for several things. We ended up putting him on Adequan injections (because he has a previous pelvis injury) and we decided it would be beneficial to him because he is going to be prone to an earlier onset of arthritis anyway.
The Adequan injections by the way, are also on occasion, used on horses with navicular syndrome.
The vet and the farrier were both involved in my issues with my horse through out the year. The lameness was as the OP has discribed not that bad really. We had the farrier take some off the toe and raise the heel, we had the saddle fit checked and changed, put him on magnesium and I bought a new english saddle, I have a $200 western pad and a thin-line that I use for english as well.
We also did some Chiropractic treatment.
My horse also blew several abscesses throughout the year which also threw us off. I actually ended up requesting a full lameness exam with x-rays in the end and now we are on the road to recovery but it isn't that super easy to diagnose a slight lameness.
Just make sure you speak to your trainer, your vet, AND your farrier. Good luck.
"Be a best friend, tell the truth, and overuse I love you
Go to work, do your best, don't outsmart your common sense
Never let your prayin knees get lazy
And love like crazy"
Last edited by farmpony84; 09-10-2012 at 12:40 PM.