I gave him another last night. I think he smelled it because he was hopping around and looking excited before he actually saw it. He even looked different... feathers slicked down, neck fully extended, pupils dilated. He made an eee, eee, sound I hadn't heard before when I gave it to him. Definitely excited! How often should he have one is my question? I bought a bag of frozen wings so I could boil one for him as often as he should have on.