Generally speaking, a 10 lb. bag of SOJOS ORIGINAL or an 8 lb. bag of SOJOS GRAIN-FREE will last about 6 weeks for a 26-50 lb. adult dog – while an 8 lb bag of SOJOS COMPLETE will last about a month. An average sized cat will go through a 4 lb bag of SOJOS CAT Food in a little over 2 months.