Basically, you have to find some kinds of prasadam, food offered to Krishna, that you like so much that you forget about the chicken. If you are really addicted, there are so many imitation chicken preparations now that are made with vegetable products like gluten. They may be offerable to Krishna, as long as they're free of eggs, garlic, and onion.
Also, chanting the Hare Krishna mantra will give you a higher taste. Krishna explains this to Arjuna in the Bhagavad-gita, when He says, "The embodied soul may be restricted from sense enjoyment, though the taste for sense objects remains. But, ceasing such engagements by experiencing a higher taste, he is fixed in consciousness." (Bhagavad-gita, 2.59)
Anyone can chant anywhere and anytime and get spiritual benefit. At the same time, mantras are more potent when received from a teacher and chanted as part of a process of self-purification. All formal training requires discipline. When we chant the Hare Krishna mantra while avoiding things that intensify our material illusion, we can more easily experience our natural spiritual consciousness.