I know this topic has been discussed before, but I'm wondering if I should increase the amount of salmon that I mix in with her food. Right now I'm just adding one can a week divided over three meals, but I've been reading how good it is for their joints and wondered if I should maybe increase it to a couple of cans a week. I just put about a third of a small can in her meal. I used to use sardines, but I thought they might be too salty. The salmon I can get "no salt added."