Marek's can present in all sorts of ways, so not always the splits. Since she was attacked, I would lean toward spinal injury.
If you try the sling she needs to be monitored, if they have balance issues they can flip out. I would not leave her in it all the time, move her from sling to laying down. You will probably need to clean her up is she is soiling her feathers as well.
If she freaks out with the sling, you can use rolled up towels to prop her up inside her hospital ward. She needs to stay hydrated, so push fluids.
If you try the sling she needs to be monitored, if they have balance issues they can flip out. I would not leave her in it all the time, move her from sling to laying down. You will probably need to clean her up is she is soiling her feathers as well.
If she freaks out with the sling, you can use rolled up towels to prop her up inside her hospital ward. She needs to stay hydrated, so push fluids.
