Hersy –
Those look like good foods. When I fed kibble I switched to a new food at the end of each bag. As Patty mentioned, some people prefer to have multiple bags open at once. This would be fine if you wanted to buy really small bags or have multiple dogs because food should be used within 4 weeks of opening (tops). I personally preferred to get through each bag as quickly as possible to ensure maximum freshness so I only had one bag open at a time and only purchased an amount that would take two to three weeks or less to use up. I rotated canned and fresh food toppers daily. You may need to gradually transition from brand to brand at first, but once your dog becomes accustomed to variety you should be able to move from food to food with no transition. There’s really no method to it, just switch frequently.
