If the fish you are catching are 12" - 16" and weigh 2 to 3 pounds, they seem healthy to me. That's a healthy weight to length ratio. I would keep fishing and record their length/weight before I'd make any judgements. You've only been there a month. I would change fishing tactics first. I know you've already have caught a bunch of fish and it would seem like you would have caught a big one by now just by catching that many fish. What baits are you using, what time of day, depth, etc. A lake that big with fish as healthy as it sounds, you can be sure there are some big ones in there somewhere.
