Yes most likely chicken but identifying a bird species from feathers is very tricky unless you have a partial carcass or very distinctive feathers (e.g. peacock, rosella). I think we might have to put this as inconclusive. Sorry Lisa.
Thanks everyone. I should have trusted my gut! And thank you again, for letting me know what you need for ID purposes. I love what I learn from this site - and really appreciate your time, patience and expertise.