I raise, breed and train Britts, and I'm getting them used to chickens right now.
Is this dog a bird dog or pet? If its a bird dog or aspiring bird dog the methods will be different.
If not a bird dog place chickens in a cage in the dogs yard, when the dogs wants the chicken stimulate it on the ecoller and give it a stern "no" command.. If it looks at the chicken, stimulate
Soon, it'll ignore the chicken in the yard, give this days at intervals.
Let chicken out and if dog doesn't do everything it can to avoid the chicken, stimulate it.
This of course would be very bad for a bird dog you want to hunt..but its the easiest way. Chickens are bad!
If this is a bird dog its much more complicated but the dog must be trained well to effectively chicken proof it, but most importantly you must have a lot of "good birds"
My two britts ignore the chickens, all I had to do was say "no" as they pointed the chickens the first time they seen them, then I rolled the chicken tractor near their kennel, if they looked they got a "no" then I let the pigeons free fly, they're so busy worrying about the pigeons who they know is a "good bird" they could GAS about the chickens.
Now they don't even check out the chicken tractor as they go looking for good birds, and I didn't even use an ecollar.
View attachment 265929