Watch How Good We'll Fake It

Alright first time doing this so I'm going to do my best lol

Umm first of all the color scheme is lovely, your background looks really nice! 8) I'd suggest adding more grass though because there's just some random wisps of it here and there, and they look like they're sort of floating with all those patches of grassless green field. An easy way of doing this is creating a custom grass brush or copy/pasting a patch of grass all over!

Okay character time! Firstly I suggest to keep the use of white and black in shading to a minimum. You can create much more interesting and believable looking shading using different color schemes. Here I would have suggested using a tan/yellow for the highlights instead of white, since the backlight in the drawing is a sort of golden sky. For the dark shading, I would have suggested a dark brown or dark green. 8)

Next, I think you could use some more anatomy practice! X) The poses are very interesting, but the drawing would be enhanced if you took the time to use proper anatomy!
The paw angle on the characters where you can see the paw pad looks a little awkward, I'm not sure if you'd be able to see the paw pad in that position, let alone if the paw can flip up like that so you can see the bottom, it might be a little painful XD. Also, on the character on the right, the arm furthest to the right can't go that far out, the arms generally stay to the body in a linear fashion. 8'D

Finally, just a small nitpick, your shading has great depth but on the colouring you've left a lot of plain straight lines. (ex. the cheek on the left character) You should at least make the colouring to be jaggy, so that it presents the furry texture as your shading does. 8)

Hopefully that was uh, useful lol
Good luck on your next picture!