So glad to hear that Hazel is on the mend!
Curious to read what suggestions the more experienced members will offer for her sister (I'm new at this).
As an adjunct to whatever else you try, again I'll plug the flower remedies. We've used them for our dogs' behavioural problems in the past...
BTW, I agree with not causing more trauma than is necessary, particularly when Hazel is already stressed out. But if she is more easily handled at night, perhaps it would be easier to check these things tonight rather than in the morning? Just a thought.
Oh, and the Rescue Remedy should be...
The arnica montana that I mentioned in the other thread would definitely be indicated for the pain and swelling, as well as the emotional trauma. You'll be looking for the homeopathic version (not a gel, cream or tincture). Ideally, look for pellets that are 30C or so (if you can only find 6X...