Hi folks, I've been feeding my cat a lot of tuna lately, the premium human brand because he loooves it. I have read that it contains mercury and am now a bit concerned that he'll ingest too much Hg. So I've switched him to premium dried food, the occasional Dine satchel and a small tin of Sardines daily. I have read that Sardines do not contain or contain minimal amounts of Hg. Luckily he's getting a taste for Sardines now as much as Tuna. Does anyone else have similar worries?