She hasn't so much as coughed since I changed her hay. But has not gained her energy back to the full extent.
The local vet's think it could be a heart issue, and since starting to exercise by hand walking, it is looking more and more like she does. She has a jugular pulse, edema that doesn't seem to fully go away, including in her chest and belly, and she gets fatigued very easily after 10 minutes of walking.
Vet thinks she could live a long life, if I keep her in a low stress situation, so her heart doesn't have to work to hard. She may even handle very light, again stress less work (think plodding around her pasture). But she also said it was my call on if I continue light exercise, it just may be getting the allergens out (she has only been on this new hay exclusively for a short while), and might perk up more with exercise. Or if I want to or not put her on something clear up the edema.
If it is her heart, she'll be a pasture pet, period, I have the money to keep her. But I don't know if I should keep going or retire her, she's only 13. I am getting her a natural breathing supplement, other people around here say is great for horse's with allergies and heaves, I wish I could give her more energy, it's hard watching her be so dull in comparison to what she was. It's also hard knowing I didn't buy her to just eat our lawn, after losing Mooney though, I can't put her down.
I know it is my call, I just wanted to see what someone else would do in my position, sometimes it is overwhelming.