Has anyone tried using a featherbed mattress topper contained by their duvet cover instead of the mundane down comforter? I have not have good luck near regular down comforters not bunching...

I have not have good luck near regular down comforters not bunching up etc. inside my coverlet, but I know that featherbed mattress toppers keep their shape much longer, so I be just wondering if it would be okay to stuff my duvet cover near a featherbed instead of the down comforter.
Answers:    The toppers are very robust. Have you tried to attach ties to the corners of your duvet cover that you could attach to the comforter? That has worked for me. I have a feather bed that i concluded up giving away. They are also not wide satisfactory as they just sit lying on the mattress.
As long as it fits, why not?

That thick of plume comforter may suffocate your small dog if it sleeps underneath, though.