WOndered if you had seen the recent edition of "It's Me or The Fat Dog"? Basically, giving your dog stuff like this is killing it with kindness. Pet obesity is becoming one of the largest killers of domestic pets. Do you ever see a fat wild animal???!
As long as they are getting the proper nutition through their daily meals, treats should be pet specific and limited by the weight of your animal. If you are giving your pet processed ready meals, the additives and colourings are also no good for them and will give them the squits and other digestive problems. As already said, chicken bones are an out and out no no although a little cooked chicken should be ok and is actually good for an upset tummy with rice.
Please don't give your dog any more of this crap food. It makes me so upset when people have pets yet don't take the time to look into what is best for them. Some people argue that in the old days scraps is all the dog got, but in the old days e numbers etc were unknown!