You need to smoke at a higher temp. You need to run your smoker above 325. If your smoker can't go that high you'll need to put the bird on the grill or under a broiler. I run my smoker at 350+ when doing chicken.
I have 2 smokers, 1 is just a smoker, the other is a smoker grill. I think I'll try smoking the chicken in that one because I can cook and smoke at the higher temp. I'll let you know how it comes out Thanks for the info.