Eggs dropped on Cruella

Yes it was a scene they filmed. I have the novel and it was a great scene to read as Cruella describes in detail what she'll do to the animals if they don't hand over the puppies. She goes into graphic detail what will happen to them.

"Now listen to me you country bumpkins-you obivously don't know who your dealing with. You know what i'm here for. The Puppies! If you don't want to hand them over to me immediantly, i wil simply rip your sorry heads from your bodies and personally saute', souffle',skewer, and skin your squealing carcasses into shish kebabs and hand luggage!"

That is then when chooks from the rafter above her drop and pelt eaggs down on her.

Cruella cleared her throat. She would give them just one more chance.
"I have an announcement to make."
A final egg plopped on her head.

Now that would have been a terrific scene to watch in it's entirety with the rest of the movie which i strongly believed should have gone at least another good 15 minutes longer.
The picture of Cruella being pelted by eggs was posted in an edition of The Disney Adventure Magazine but i have since miss placed that book and would you believe how hard it is to track down one paticular book and picture? Worse than i could have imagined.
Thankyou to the guys who have read my post :)