I just had to find what foods he would eat (but always offering other healthy things too.) For example, when you said he the the chicken on the floor... my son (16 months) is the same way with chicken also. But chicken nuggets, he will eat. Or maybe if I give him ketchup to dunk in,he may eat some chicken. Try a variety of things, he's not going to starve himself, I promise. Offer lots of fresh fruit - my son can't get enough of this - I give him a whole banana and he thinks he is so big and special and will devour it. He also loves blueberries, mandarin oranges, pears, etc. Just remember he may not always eat much. Its surprising sometimes how little toddlers will eat in a given period of time and then will have other period where eating is all he does. Just refuse to offer him the junk food (once in a great while is okay after healthy eating habits are established) and keep offering healthy things. He will not starve, he will eat. Just offer a variety of tastes and textures so he can choose to eat something that appeals to him.
Here are other suggestions that my son ate at this age:
frozen go-gurt tubes (LOVED this)
hotdogs cut up very small
mac n cheese
pasta noodles with butter
chicken nuggets
french toast sticks
toast with butter, jelly, slice of cheese, or applesauce spread on it
cottage cheese
applesauce
any fresh fruit
steamed broccoli if I add some shredded cheese
shredded cheese
Good luck - remember, it's our job to offer them when and what they need and it's their job to decide how much if any to eat of it :)