The Bunnings Workshop community can help with your home improvement projects.
How do I get the 100 or more pigeons to stop invading the yard when she (mrs) feeds the other birds and the owls no longer work
That sounds like a difficult problem @Ohmygodshesays. What area do you live in? And have you tried not feeding any of the birds to see what happens?
Let me tag @Brad for you as I know he has had lots of experience with birds. Hopefully Brad and other members of the ever-helpful Workshop community can have some suggestions for you.
Let me extend a very warm welcome to Workshop. We're happy you could join us. Feel free to post anytime you need a hand or have a new project to share.
Workshop is a friendly place to learn, get ideas and find inspiration for your home improvement projects