My two little stinkers will not eat canned cat food. I've tried different brands, flavors, etc. They will eat the dry cat food, but I feel that their diet should contain both, even though the dry is the majority. They will also eat canned Tuna. I feed them a quarter of a can once a day, sometimes skipping a day. My concern is the mercury reported in the canned tuna. Canned Tuna contains lower mercury levels than fresh and the warning is for children, women who are pregnant and women of child bearing age due to possible birth defects. My question is, am I poisoning my kitties and should I stop this practice and continue my quest for a canned kitty food they'll at least look at?