It looks like a dry/crusty and whitish-grey. I did not dust the crickets today. He gets phosphorus free Rep-Cal with Calcium and Vitamin D on Tuesdays and Fridays, Herptivite on Mondays and Thursdays, and Miner-All 0 on Wednesdays and Saturdays. He is about 3 months old and gets about 8 small crickets a day.