Well then my friend... perhaps you should rethink your dietary habits if that's what comes to mind at the mention of excretions.
But I guess if you did... You could add your feces to the repellent mix
Are you 100% certain that all those good homes you found keep the cats inside?
I guess not!
Am I reading this correctly - you catch feral cats, then release them into a farm shed ? I don't know where to start. How many native animals have been tortured / killed because of you keeping those killers alive?