is there such a thing as condition scoreing for dogs?

i have 2 cross breeds and obviosuly there would not be a average weight for them text book.
you can feel there ribs, but cant see them. and there top line and hips are covered well with firm hard muscle.

does this sound liek good lean condtion?

sounds good to me

heres a link
http://www.cvm.tamu.edu/clinicalnutrition/bcsdog.htm
hope this helps