Joint Bend Angles on Quadraped

[Jack Francois]

I am new to custom skeletons.  The front legs are the Arm bones (collar, elbow, etc) and I can't seem to get them to bend straight forward rather than out to the side.  I have tried moving the joints around, which seems to affect it, but not sure how to get it the way I want.  Thanks. 

[OptimoMaximo]

What aboutt he bone roll values? In edit mode, open the panel ont he right with N, and go through all the bones. They will certainly show a number different than zero. That's most likely the cause.