From: Body Condition Score Chart Emaciated Emaciated dog Ribs and lumbar vertebrae obvious, pelvic bones and all other bony structures obvious and prominent. Tail base prominent and bony. Accentuated concave abdominal tuck Accentuated, severe hourglass shape to waist. No discernable body fat. Obvious loss of muscle mass. Optimal Optimal weight dog Ribs, lumbar vertebrae, pelvic bones and other bony structures easily palpable with slight fat cover. Tail base smooth with thin, soft tissue cover. Concave abdominal tuck. Smooth hourglass shape to waist. ie: From: K9 Station Dog Training & AuxArcs Australian Shepherds Emaciated. This dog looks to be a lightly-built breed, possibly a purebred Greyhound or sighthound mix. Even though she would seem "skinny" at a fit weight, it is apparent she is extremely underweight. She has had a recent litter of pups, and this means that her body's resources have been depleted in ways other than just not having enough to eat.