The grizzly bear which is featured in the gallery "Grizzly Country" was so strikingly marked with its black legs, I inquired of Nature Alberta as to whether this was unusual or just a colour phase. You can see their response by following the link below. The article appeared in their magazine's Fall Edition 2017 (Volume 47, Number 3).
And many thanks to Nature Alberta for their informative response.
Grizzly Bear"PYJAMA WALK"
(Kananaskis, Alberta, CA)
Grizzly Bear"U-PICK BERRY STAND"