They use IV tubes mostly, but Duck serves Debussey a few bags of chips per day orally.
Duck's poop fetish = a huge problem. Debussey has not dared to tell the Mental Asylum doctors in fear of Duck sabotaging the equipment used on Debussey with her brainpower.
This is Duck: If you are in for some fethishes, you just come along baby

I'm a fruity fuck, Im THE DUCK!