Well I'll say this.
1. Your fish are used to that type of weather so making the pond bigger should not effect how the fish do this winter. They should do better I would think.
2. Walleye from my experience don't really get bigger until they hit about 20 inches. They remind me a lot of Northern Pike. Skinny, skinny until they hit a certain length then they start to fill out. 14 and 15 inch Walleye are gonna be skinny all day every day...IMO.
RC
