Female Mourning Dove with strange growth

Does anyone know what’s wrong with this dove? She has huge puffs of feathers coming out of her neck. She has been like this since last year, and she has gotten much worse! she can eat and acts ok but I’m just curious.

Ibis on a powerline

I didn’t know that ibis sat on powerlines.

Cornell Lab of Ornithology

Cornell Lab of Ornithology