What are some of your guys favorite feeds? What are some things you look for in feed? I looking for a high fat and high fiber feeds for my mare, would like to stay away from high starch and sugar feeds! Thanks

Obviously your mare is in pain....so there is a need to have compassion for her. Talk to your vet about ways to make her comfortable. Horses do not just refuse to work, there is a reason, either pain, or not understanding. You cannot train pain. 

I agree 100% Which is why i posted on this forum. I want to make sure we have all our bases covered or if someone has had this before! she is on pain meds and getting handwalked and turned out daily until our vet appointment. She is seeing the best vet in our state. Lameness check, x-rays, ultrasounds, etc.... I could careless if she ever competed again I just want her to be happy, healthy, and pain-free. she hasnt always been this way so this is why i know 100% this isnt attitude.

What specific advice or information are you wanting from us?

It sounds like this horse has many, many issues going on, and not just one thing.

How long has she been having issues?

You said she's already on pain meds. What is she taking? How long has she been on pain meds?

You said she has arthritis. In general, arthritis benefits from regular light exercise -- not time off.

Any heat or swelling anywhere? 

my old gelding had swelling and heat in his left hock and so we did xrays. Then hock injections in March. And I am trying summit as well. I just got done with his loading dose.
He was showing many of the symptoms you listed! I had tried 10 different oral supplements and none helped. I am feeding him platinum performance with glucosamine right now for his particular situation. I may try fourflex ha in the future. We'll see how it goes. 

good luck. Sounds like your on the right track to finding out the problems!