As long as you hold a current license for the season and are hunting with a valid weapon for that season you may shoot them. For example, I could have a small game license and be hunting coyotes with my .243 during coyote season and shoot them. It is kind of a weird situation because there is no season for them so you need to technically be pursing an animal that has a season. Now I know some small game doesn't have a season and is open all year round but I'm not sure if it is possible to get by with that. If there isn't a season running that I could use to carry afield an appropriate gun I would get in contact with my local C0 and see what could be done.