The reason the doggie bag is going faster is because they love it. Like kids love McD's... Just because they love it, doesn't mean it's good for them.
I did a rack by rack comparison for a couple of months last year. I posted it on here somewhere....
Anyway, long story short. Less babies and more cannibalism on Doggie Bag. And, even though DB was cheaper($12.99 at the time), it cost me more on the DB, because they ate more of it. $13/40# DB versus $18/50# rodent block comes out almost the same per pound..
My mice, I don't even want to go there... they wasted away, and ate almost all the babies on DB. Not too mention, all the rodents always looked greasy.
Now, since the prices have increased, I can get rodent block cheaper . DB in my area is now $16 for 40#.