Duck has big chest. Is this normal?

Both my female ducks (laying) have big chest, When I touch it its just a bunch of skin and feathersnot sure if this is normal but I've never seen it on any ducks.

3 Ways to Tell the Sex of a Baby Duck - wikiHow

17 Different Types of Ducks - Duck Identification

3 Ways to Tell the Sex of a Baby Duck - wikiHow

Wood duck Smithsonian's National Zoo and Conservation Biology

My chicken has a lump or tumor on her chest--what should I do

Everyone Loves the Hot Duck

Australian Wood Duck - The Australian Museum

24 Ducks in Georgia

9 Ways to Sex Ducks and Baby Ducks • New Life On A Homestead

Understanding Backyard Duck Behavior - The Cape Coop

Waterfowl ID: Discover All Types of Ducks, Geese & More