Where can I take my cat to rehab for his Greenies addiction?

We don’t give him that much, and he eats plenty of top quality food without fillers (Wellness, Felidae, Nutro Max, etc.) But still he acts like a severe addict when it comes to Greenies. He’ll run to my husband’s study and to extricate him to give him snacks. If I get up in the middle of the night, he tries to herd me downstairs for Greenies. He’s very inventive and apparently addicted. He’d rather have a few Greenies than fresh chicken! Our vet, who runs a holistic veterinary practice says Greenies are not harmful.
Ack! Kitty crack! Why are they so addictive? Isn’t it just a bit suspicious?

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