Are Australian Shepherds naturally thinner dogs?

He's not a mini, hes pretty tall. But under all that fur theres almost no meat on him. I can feel his ribs, spine and hip bones extremely easy. Hes not emaciated though, theres meat on his thighs and shoulders and neck. I feed him two cups of Purina True Instict a day. I used to just fill his whole bowl but... show more He's not a mini, hes pretty tall. But under all that fur theres almost no meat on him. I can feel his ribs, spine and hip bones extremely easy.
Hes not emaciated though, theres meat on his thighs and shoulders and neck. I feed him two cups of Purina True Instict a day. I used to just fill his whole bowl but quit because he wasnt gaining weight.
He also gets lots of table scraps.
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