The Pasuk says "mi'Kol Ma'achal;" why does then add, "Asher Ye'achel"?
Kol Eliyahu: For each species, Noach prepared the amount that it can swallow at once. 1 Miraculously, this sufficed for the entire year. This is why there is no mention of a miracle that the Ark was able to contain food for an entire year for all the animals.
Yoma 80a expounds these words like this.