The riding I did was through some watery mud in an arena at a trot and lope for like five minutes.
To my understanding, the point of "stall rest" after injections is not so much to restrict their movement per se but to keep the injection site CLEAN
to avoid infection.
I'm very dissappointed to hear that your vet didn't educate you about that?? Yes, the overall risk of infection is low when you do injections, but it is devesting if you get an infection in a joint.
My vet(s) have never said 3 days of stall rest. I've used two different vets and they both told me stall rest for the first day (in a CLEAN
stall) and then you can turn them out for the next 2 days. But absolutely they must have 3 days off, minimum, regardless.
She has had X-rays on her hocks and the vet didn't find anything, but the vet we got xrays from has a reputation of not doing well with lameness.
Just to make sure I understand you correctly.
You have done hock x-rays in the past, but it was with a different vet who either didn't know much about lameness and/or didn't take good x-rays.
Did the new vet you just went to, did they look at the hock x-rays? Or not?
I'm really not trying to rain on your parade, but I'm just a little suspicious of what your vet did and did not check, before deciding the only
problem with your horse was the one stifle.
It's obvious there was a problem with the stifle with the fluid present, but it's very common for a horse to be compensating in another joint (to make up for the affected joint) and thus that
can cause an issue in the compensating joint.
Just like if you had a sprained ankle. You are going to overload your good ankle with weight, as well as probably bend over a bit as you walk around on crutches. Or walk around funny if you are trying to walk without crutches. You'll end up getting sore in another body part, because you are trying to stay off your hurt ankle. .... Maybe not the best example but maybe you get what I am trying to say?