My wee dogs think nothing of going without food for 3-4 days,they are masters of manipulation and they know just one sad,staaaarving stare from those big brown eyes will crack me into giving them whatever they want!!
Well,thats what it USED to be like,but their finickiness was literally driving me round the twist,not to mention wasting me huge sums of $$$ from all the good food i was throwing away! I must say i cant blame your dog for rather having chicken then yucky chum,can you? ;) I am lucky if my dogs eat 1/3 cup of dry food a day,at $35 for a 3 kilo bag i cannot afford to throw it away :( they get more home cooked/raw food than anything else! The trick is to not let them know that you have given in to them.Throw all the chum away and start fresh,but eventually he may turn his nose up to chicken in the hope of something better coming along,if this happens you must NOT give in and give something else(as i did) You know he loves chicken and if he doesnt eat it then he is just acting like a spoilt brat :D My dogs would eat something with gusto for a couple of days and then decide they didnt like it anymore,i then promptly swapped it for a more tastier food until they turned their noses up at that,usually a day or two,until there came a point where nothing was good enough for their fussy pallates! In my case I was the one who turned them fussy,i created these monsters

I used to have rotties who would hoover up whatever i gave them,i had no idea that fussy dogs even existed!!
I would by a premium quality mixer and add the chicken to that,you can also add vegies,organ meats,tinned sardines,mackarel etc.
Then you will both be happy,your dog because he's enjoying what he's eating and you, knowing that he's getting all his vitamins and is happy with his food :)
Just remember,chicken on it's own is not a balanced food,so you must balance it out yourself.I agree with Tohme,buy a couple of books,join a couple of sites and bombard them with questions or just ask away here :) There are enough of us here who feed home made food who can steer you in the right direction when it comes to balancing things out. Sorry if you've already said,but do you also feed dry food?How did your dog take that?
christine