Is eating more tuna and chicken meat good for your diet?

Yes, Tuna or chicken is a part of a good diet. Just remove as much skin of the chicken. The best way to do with them is grilling. In such a way, you do not fat in them but the grilling takes away most of the fat. They are best used for whole wheat bread as Sandwiches. Eat lots of greens so you get mush needed nutrients.