It is possible to have chooks & dogs live together. But I wouldn't dare leave them un attended while I go to work.
I have been able to train all 3 of my dogs not to eat the chooks.
Hey I also have a mixed rooster Sussex x, my hens are pure isa browns & Sussex, i have a new girl wich is a sussex x (think australorp) I love looking at the different colours. i am now getting brown hens with the black flecks like a sussex & they seem to be very popular & my roosters seem to go...