I am feeding 6 cats Kirkland Signature kibble and a variety of canned food. I was told that I need to switch in a bag of kibble of a different flavour once in a while to prevent them from developing an allergy to the main protein in the kibble they are eating now which is chicken. Is there any truth to this or what? Their canned food is chicken, Turkey, some beef and some fish flavours I rotate each night they get something different canned wise. Their kibble is Chicken/rice and that doesnt change only the canned food flavours do
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