[PikaPerfect]

Alrighty, this is the most advanced redline I've ever done so... Hooray!

Anyway, things to note:

If you were to take a dog's muzzle off and lay it across said dog's face, it would pretty much be the same length as the dog's face(Don't try to imagine how they dog got into that situation).
A dog's hindquarters don't go out above the leg, it just kind of stops.
Dog paws are pretty small. Small enough to fit in the dog's mouth.

I suggest looking at some dog skeletons and referencing real images for a while. It helps a lot! I'm fairly rusty at drawing dogs but I hope this is helpful :>