File: 1332621564.jpg-(49 KB, 400x299, Millet.jpg)
Speaking of, there is a lot of weird logic associated with vampires, but if you look close you can often see the underlying reasoning.
For example, in some countries a vampire could be created if a cat jumped over the corpse before burial. A bit odd, right? Well, apparently there's a widespread Slavic belief that the human soul sometimes appears as a tiny silver mouse with blue eyes. As such, the cat is an evil spirit attempting to eat the human soul and replace it, thereby animating the corpse. Thus, the logic of the cat thing is obviously based on superstition but it's still a reasoned out cause-and-effect.
Other weird one you see all the time is that vampires are compelled to count seeds, so peasants will fill the coffin with millet, shown here, or spread it around the entrances to their house. The vampire will be so busy gathering the seeds, the sun will come up and he'll flee. It’s strange, but consider it a little more closely. Vampires consume LIFE. The book makes clear that they don't just drink blood. Romanian vampires eat hearts, Ruassian/Ukranian vampires eat the flesh of corpses, Bulgarian vampires eat hair, toenail clippings, feces; all byproducts of living things.
A seed is a symbol of potential life, not just for the wheat it could grow into, but also for the life that would allow when humans consume it. As such, the vampire gathers the millet to eat it. Each seed represents life and, to a lesser extent, units of time (each one representing the lifespan of the plant that could grow from it). It's not as good as blood and flesh, but it's still sustenance the vampire can use.