How to target biggins

So I’ve been fishing this pond for about a week and caught tons of bass with live minnows and a spinner bait. They’re all midsized bass I’d say around 1-2 pounds maybe almost all the same size. But I have a feeling there’s just a hog lurking around in there, they have lots of minnows and frogs to feed off of so they eat good. My question is how can I target bigger ones if there is any way too?