My female used to act like that with kibble. She would slow down if I put water in the kibble and wouldn't act ravenous after she finished.
She also doesn't act that way now that I feed her raw meat or canned food.
I think it's pretty unnatural for them to be eating completely dry food. Their natural diet has a lot of water in it and isn't eaten as quickly as a bowl of kibble is.
That's just an observational assumption on my part.