We feed our dogs dried dog food. We buy it in fifty pound bags from one of the local farm stores. I almost always buy two bags at-a-time.
Hercules, our older German Shepherd, is not as active as the younger one. He gets one "scoop" a day. Our scoop is a disposable, snap-top, plastic container that measures 5.5" long by 4.5" wide by 1.75" tall.
Zeus, the younger German Shepherd gets 1-1/2 scoops every morning.
I wondered how long 100 pounds of dog food lasts because I never really measured it.
We keep the bulk dog food in a steel trash container in the basement. The trash container deters rodents and the basement is the coolest part of the house.
I filled our intermediate bin, another plastic, snap-top container that measures 11"-by-13"-by-10". For the record, that is 6.2 gallons of volume.
Our digital scale informed me that the filled intermediate container weighs 32 pounds or approximately 45 cubic inches of dog food per pound.
Quite by accident, that is almost the size of our scoop. The math is easy. 1.5 pounds + 1 pound equals 2.5 pounds of dog food a day.
100 pounds of dog food divided by 2.5 pounds a day equals 40 days. Nine bags of dog food would last half a year.
That might be good to know.