Arthritis in hocks and si, psd— help!

Pandora21

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Hi all, Im wondering if anyone could help me figure out what’s going on with my mare?
I’m going to copy and paste her report from the vet to save me struggling to word it correctly. She’s just had steroids in both hocks and si almost 4 days ago and is moving a lot worse than she was previously. I read it could be “Has learned a specific pain avoiding movement, Steroids change sensory input, The brain has to relearn limb placement”. Or could it be something else?
She’s laying down way more than I’ve ever seen before, 24/7 turn out and appears more comfortable on grass, choosing to avoid walking on concrete whenever there was grass next to the road. I stopped hand walking and will leave her be to see if it could be temporary inflammation from the injections or the above, does anyone have experience with this?

Diagnosis: On examination Pandora was very bright in demeanour. There was a lack of significant trunk muscle discomfort or restriction of range of motion. Dynamic examination confirmed bilateral hind limb lameness (most notable in the outside hind limb when lunged on a soft surface) in spite of which, Pandora was forward & willing.
Repeat ultrasonography of the proximal suspensory ligaments confirmed the presence of fibrosis & enlargement of the ligaments (as expected with chronic proximal suspensory desmitis, PSD) however evidence of acute inflammatory fluid accumulation was more focal than previously imaged.
Radiography of the feet revealed that Pandora has good foot balance and no evidence of reverse pedal bone rotation ( a negative prognostic indicator for PSD).
Overall Pandoras level of discomfort on a soft surface would indicate ongoing dysfunction of the suspensory ligaments, making her unsuitable for schooling or jumping. However she is extremely bright & very forward on firm ground and would therefore likely enjoy hacking if she is shod & the degenerative joint disease can be managed.

I rescued her back when I lived in Romania and have had her since 2021. She’s approximately 10, and was diagnosed with arthritis and bilateral psd in 2024, previous to this she was moving just fine even competing we only noticed slight stiffness on tight left turns, retired for a year, now she’s constantly lame.
Foot balance is perfect so that won’t be affecting the conformation. The vet said she things psd is primary and arthritis secondary, she was under heavy workload from a young age so that would be the root cause.
Considering shock therapy, supportive shoeing.
I’ve attached a photo from August when she was with me, she did show a little bit of lameness but was happy to run around in her field. Put her on loan to a friend while I went to uni but have now brought her down south with me due to her decline, she’s gained a lot of weight, visible in the picture with her bandages.

I’m already thousands down and as a student I’m struggling to fish out more, so wondering what has worked for other people or some advice before I spend a lot more blindly.
Thankyou in advance!
https://drive.google.com/file/d/1jsURmDq9JQ4vXRyuT2v1q4WNuwVdumxR/view?usp=drivesdk
https://drive.google.com/file/d/1tOVlQ0B54jaUgIdE89nr98DOMOmIUtFJ/view?usp=drivesdk
https://drive.google.com/file/d/1jsURmDq9JQ4vXRyuT2v1q4WNuwVdumxR/view?usp=drivesdk

https://drive.google.com/file/d/1ahjf_OK56JTpGodmnyt5FwnHgjsoJcmK/view?usp=drivesdk
 
My first thought when I hear "avoiding walking on concrete shortly after steroids" is steroid-induced laminitis. I would be getting the vet out again.

It's very possible that the current diagnosis is correct, she has just suffered a known side effect of steroids.

Also those attachments aren't working, you need to change access permissions or use screenshot images.
 
My first thought when I hear "avoiding walking on concrete shortly after steroids" is steroid-induced laminitis. I would be getting the vet out again.

It's very possible that the current diagnosis is correct, she has just suffered a known side effect of steroids.

Also those attachments aren't working, you need to change access permissions or use screenshot images.
We did bloods before the steroids to make sure she wasn’t at risk for lami, but it definitely looks like she’s got in now. Will be getting the vet
 
Ah
My first thought when I hear "avoiding walking on concrete shortly after steroids" is steroid-induced laminitis. I would be getting the vet out again.

It's very possible that the current diagnosis is correct, she has just suffered a known side effect of steroids.

Also those attachments aren't working, you need to change access permissions or use screenshot images.
Oh I see, I’ve changing the settings now
 
We did bloods before the steroids to make sure she wasn’t at risk for lami, but it definitely looks like she’s got in now. Will be getting the vet
My 16hh ISH was not considered a risk, his breeding was mostly tb, but he did get it after a steroid injection. Mine made a full recovery but getting treatment as soon as possible is key.
 
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