GlicksChicks
Crowing
Then I would suggest taking more aggressive action to keeping their pets off of your land.I'm taking down my bird feeder but again this is not my responsibility to design a fence for their birds. Also I don't want any contact with my neighbors as I have had lots of trouble with their stray animals in the past.
If you do not want to contact them or build a fence, then you will have to do something with the chickens.
The easiest way to resolve it would be to talk to them or have something up to keep them away, built either by you or the neighbor. It is not easy for you to keep them off your property if you do not want to talk to the neighbor.