You could always clip the wings of any "escapees". It's a pain to clip multiple birds; so, as I'm in the same situation as you, I chose heavy and flightless breeds. (If I keep my Ameraucana/EE, she will remain clipped.)
Also, are you certain that your seven cats cannot jump your chicken fence?
I have an EE which looks to be a Wyandotte mix, and she's quite grounded! So it depends on the build of your birds. The bulkier, the less height.
Also, are you certain that your seven cats cannot jump your chicken fence?
I have an EE which looks to be a Wyandotte mix, and she's quite grounded! So it depends on the build of your birds. The bulkier, the less height.