I would just turn her out to a pasture or paddock and let her self-exercise. I would not ride or longe her. I would take her off of all grain and give her just hay.
I will talk to my trainer about her diet. I really hope she listens to me about the no grain.
But in the mean time, no grain is really necessary, and 6 flakes of hay (if they're about 5 pounds each) is probably too much for her (assuming its good quality hay).
I'll try to make it 5 flakes.
The horse should be confined to a stall with no turnout or exercise until she has been diagnosed.
I can't decide what leg it is, but I would gander her left hock is a little sore as well, who knows it could be a secondary injury. Whatever it is, she doesn't want to put her right leg far forward, or bring her left hind too far back, or bend her left hock as much as her right one. I'm going to guess whatever the injury is that stall rest is going to be best for it.
The horse really, really needs to be seen by a vet. Email the videos to the barn owner and ask if you can get one out for diagnostics. A good vet would be able to watch and see and at least gander what's wrong, maybe even a few blocks and that's it. Although an x-ray would be helpful! A diagnosis would at least allow for correct treatment.
And yes, the mare should actually be getting no grain on stall rest and needs to lose weight.
I am quite afraid that I have no way of contacting the BO. He already barely answers my trainers text messages... never mind me. :/
While I know the safest bet is stall rest, I personally think she should get some light exercise. If she is not on bute and I let her walk freely, then I believe it will help with her stiffness. I still can't get over how much freely she was walking after I took her out and she got going. She's been on stall rest all month, with turnout 1 a week for 2 hours. Whenever I'd take her out after a long week in her stall to be turned out, she'd be stiff. Yesterday after our walk, well there was a difference. I believe she needed the bit of stretching and exercise.
Nothing hard of course. Just some exercise at her own will like Cherie proposed, so that she ins't forced into something she can't do and get's worse.
I am obviously no vet, and could be totally wrong, but I just can't help but feel that if she continues 100% stall rest for another few months, it won't do much good to her mental and physical being.
Who actually owns her? You might have said but I don't remember.
Whoever it is the responsible party.
Her feet look bad too in video #4 .
She's the barn's horse... with a perfectly careless BO.
Her feet are bad, the farrier is coming on Friday (finally). 8 weeks is way to long IMO.