Pelvic fractures

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I saw a 2 year old Bichon cross 7 kg that had a pelvis repaired almost 3 weeks ago. It was a left side ileum fracture cranial and caudal to the acetabulm which was intact. The SI joint was intact so the surgeon plated the cranial fragment to the middle fragment with the acetabulm. The plate ends very close to the acetabulum. Seemed to be a good reduction and report mentioned that pelvic canal wide enough even though the ichial fragment was left floating. The dog is non weight bearing has normal flexion on the hip but very restricted extension that stops when the dog shows pain about 110 degrees. Deep pain an withdrawal and purposeful movt. Neure status ok. There was a great deal of swelling and bruising and so there is likely a great deal of fibrosis but since the acetabulum was intact this should not be terribly painful now and with this loss of extension withour some kind of obstruction. I have some recent experience with a similar case that needed to have the plate removed to stop restriction of extension. Also this previous case showed that small dogs with pelvic fractures get stable very quick. It was a pug that the owners abandone and ended waiting 10 days for surgery waiting to see if owners were going to show up. WE ended up most of a day trying to reduce the pelvis that was very stable in 10 days although very out of place. The pug now wakes me up every night snoring as my wife insists that it sleeps in our bed. So my question is when to start working on these to prevent permanent loss of rom. I feel that after 3 weeks it will be stable. We did massage, laser and muscle stim and then he walked on it in the water for a few minutes. I am curious as to whether anybody has had bad experience with small dog pelvises starting to early.

Thanks-- Jeff Bowra DVMCertified Canine Rehabilitation Practitioner26841 Fraser HighwayAldergrove, BC, Canada