Herein we report high mortality of larval Hurter’s Spadefoot Toad ( Scaphiopus hurterii ) tadpoles when fed dry powdered feeds. The evidence implies that dry powders remain suspended in the water column where they enter and clog the filtering apparatus of tadpoles. When the same foods were wetted to a paste and dropped into the aquaria as a moist pellet, the ration fell directly to the substrate and did not become suspended in the water column. Mortality of tadpoles fed dry powdered rations was severe; whereas, mortality when fed wetted feed was inconsequential. We recommend that when rations are made of ground or powdered components that these should not be fed unless first wetted. Further, we speculate that sediment and siltation of natural waters may contribute to amphibian losses via the same mechanism.

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