Ugh, why can’t I do an image submission xD
Anyway, here the redline for that square headed species thing. The most obvious mistake was that you seemed to have added some random joints in the front legs. When drawing quads, keep in mind they have the same amount of joints we do, only not in the same place, because they walk on all four. The height of the knee and ankle can vary between species, for example cats and dogs, but the idea is the same. Also, try not to curve bones too much, something we tend to do with the tights, between hip, knee and ankle.
I hope that helps!