Gimme the toy

So here I am, with a normal drawing, after many time.
I am so busy with character sheets, but I have finally got some time for draw my new pups of german shepherd, Rache (The red female on the left) and Beast (The black male on the right).

Socialization starts when dogs are pups, they MUST socialize with other pups, adult dogs and people, and since I don' t want to increase aggression in both the pups, I am starting since now to train them to be social and calm with other dogs.

Beast is three months old, and was playing with his pink pulling-leash, but Rache, younger, wants it and so in the pic is trying to get it.

Auto critique the picture
Well, since I have got problems with german shepherd, I touhgt that for "Heal" I need to draw them a bit more often as starting, because if I like my work I may like them too.
The shapes are nice, only proportions are wrong, because rache trough she is younger, seems quet bigger than Beast.
The shadings are a mess, they are just the essential and I don' t like how they came out on the toy.
About the background... no comments. I have to work on backgrounds...

Designs of Rache are ( c ) by Sumac-Ridge
Designs of Beast are ( c ) by ShockTherapyStables
Background, shapes, linearts, colors, shadings and other modifications are ( c ) by me