What kind of chicken is this? smoked?

It sounds like it's a smoked chicken. It's not possible to smoke a chicken in a slow-cooker. Smoking meat is a long process of being in a cool smoke-house which is them smoked with different woods and sometimes chemical preservatives if being sold commercially. It's not lawful to claim something is smoked unless it actually is. Most, but not all, smoked meats have been already cooked. Hope that helps.