Dog Days is kind of mindblowing. Makes me curious as to how many English, French and Chinese people make up that 9k. Probably a small amount, but it'd be interesting to know.
Next week Vol. 1 is Toriko. Nothing the week after that, then C, then another empty week, then Hen Semi, assuming it even ranks at all.
Actually, the 3k seller, Katte ni Kaizo OVA 2's sales data would be out the week after Toriko, after many SHAFT delays.