Hawaiian BBQ Pulled Chicken Sandwiches

I made these last night {along with baked sweet potato fries... recipe below} and they were delish! Best news of all, everyone ate them! Success!! They are super easy to make, too. Love me some crock pot meals!! We have lots left over, so tonight I am making baked potatoes and putting this on top... yum!

Ingredients:
1 bottle BBQ Sauce of your choice
3 lbs boneless chicken breast, thighs or a combo of the two
1 large onion, sliced into chunks
1 can pineapple (I recommend nibblits or crushed)
*Optional* Up to a half a can of the pineapple juice, depending on how sweet you like your pulled chicken (I did not use any this time because we wanted it more spicy, and a tad less sweet.)
hamburger buns or kaiser rolls

Directions:
If you use frozen chicken, make sure it is completely defrosted. If you cook it frozen, it will indeed cook but it will make a very "wet" sauce.
Place your chicken in the bottom of the crock-pot.
Top with onions, then pineapple.
Pour entire bottle of BBQ sauce over the whole thing.
Turn your crock-pot on LOW and cook for 8-10 hours (or on HIGH for 4-6).
An hour or two before it is finished cooking, carefully remove the chicken from the crock-pot and shred it using two forks.
Place chicken back in the crock-pot and stir well to combine.
Finish cooking an additional hour or two so the chicken can absorb most of the sauce.
Serve on hamburger buns {we used the Hawaiian sweet buns and it was so yummy}