I put Tilapia in my pond last year, but didn't get around to it this year and I'm noticing some thin fish.

Is it too late to put some Tilapia in? The pond is near Canton, TX. They probably only have a couple months before it gets too cold for them. What about Golden Shiners or Threadfin Shad? Would either or both of those help?

I'm already taking out some fish, the smaller ones seem to be overpopulated. I'm hoping to put some weight on my larger fish.

Thanks for any input.