I've never gone squirrel hunting, but I'm thinking of giving it a go this year. I have a Winchester 12 ga. I use for trap&skeet. Is 12 ga. too big for squirrel hunting? If not, what size shot should I use?

Also, does anyone have any tips for field dressing and processing squirrels, or know of any good websites or books on the subject?

Thanks to all who respond, I know I have a lot of questions,but I'm sure youallknow what it's like trying something new for the first time