How did Noah keep the food fresh on the Ark?

Many animals require their food to be fresh. Many snakes, for example, will eat only live foods (or at least warm and moving). Parasitoid wasps only attack living prey. Most spiders locate their prey by the vibrations it produces. Most herbivorous insects require fresh food. Aphids, in fact, are physically incapable of sucking from wilted leaves. How did Noah keep all these food supplies fresh?