Thanks again. The end result I want for the dog is that he is left unsound - he can walk and run but not perfectly.
Any tiny limp would end a show dog's career, so you have a million options to work with. Do you want the lameness to be subtle, thus infuriating his owner who tries tries tries to magically cure him and make him sound for the ring again? Thousands in vet fees later a vet points out that the owner has spent more than the dog will ever be worth as a stud (assuming this dog is a male??? w/e)
So, minor limps can be caused by arthritis caused by an articular fracture (the dog might start to do better as the fracture healed, and then do worst as the arthritis went to town (after the dog was allowed more exercise)
Minor nerve damage could give him a funny flick of his paw (untechnically totally sound but unable to extend his paw thus he has to flick it out in order to get it in position for landing. Looks really weird but totally harmless overall)
Or do you want the sympathy angle? Little Rover shatters his leg so bad (usually the far leg that took the weight while the car hit and thus couldn't 'give' and just shatters) that they had to amputate. Oh noes, my beautiful show dog is now without a leg.
Me, I've always been a fan of nerve damage and there are millions of options there (major loss of sensation can also require limb removal b/c a dog won't know not to drag the leg through the vines and stop the mass bleeding that is causing him no pain...)
In the story, he is a show dog so this ends his career but he is fine as a pet.
To avoid incontinence issues I would do as you are doing and avoid major back end injuries...
(b) I need to get it right.
I see much research in your future
But I'm happy to get you started and give you some ideas of what to go with. Feel free to ask any questions that might help you pick a path.
I asked my own vet what sort of injury would result in permanent unsoundness of movement
As I kinda covered:
Neurologic
Muscular, including cut/damaged tendons (to some degree tendons can be repaired, but not always to total soundness)
Osteopathic, including arthritis
etc
Also, as if you don't have enough mixed up in these posts by me, there's this (specifically for a horse)
Most causes of lameness fall into the following categories:
- Degenerative e.g. degenerative joint disease (DJD, or osteoarthritis)
- developmental e.g. osteochondrosis (OCD), physitis (epiphysitis)
- metabolic e.g. laminitis (founder), exertional rhabdomyolysis (tying up) (For a dog this might be obesity or rabid growth causing pelvic issues)
- mechanical i.e. overload of a structure - either sudden, massive overload or repeated, marginal overload (wear & tear)
- infectious e.g. foot abscess, infected wound, cellulitis, joint infection
- inflammatory - most of the specific causes of lameness have an inflammatory component
- traumatic i.e. injury (external trauma) (which is the approach you're taking ofc)
You could always complicate things. A simple fracture that should heal 100% but infection sets in and isn't caught in time (due to bad owner or bad vet or bad luck. Also, joint infections are hard to treat and have full recovery). They go in to fix the fracture, which is surprisingly bad considering the car's speed, and find cancer which has weakened the bone. Off with the leg.
I think I've developed a strange obsession with amputating your imaginary dogs leg. I really should go write something....
, also what were the likely outcomes of being knocked unconscious which is where I started from.
Brain damage. Dog would be on massive antiinflamatories, which have their own side effects. This is one for google as it's a straight forward question and a long complicated answer. You might have trouble with the terminology, but if you poke around you'll get tons of info.
(Plus I'm better on other aspects of neural damage.)
Cheers,
Christina