try practice sketches from photo references too it helps with anatomy a lot
try to keep the head, eye, and paw size down (my paws are even a little bit big)
remember the eyes are towards the front of the face, by the shift from nose to forehead, and have a relatively triangular shape
in snarls, the top of the nose up to the eye is wrinkled and the top gums are usually exposed above the front teeth
hope this helps

