If she had a real problem with your chickens doing damages onto her property she or he should have come to you and said so giving you the chance to correct the problem.
<scratches head>
So, not following usual "keep your animals on your property" type rules, not to mention common curtesy of not letting your animals repeatedly go onto other's property and poop and cause destruction (mild or not), means that the person with the problem has to go out of their way to tell the offender that they are not following laws?
hmmm...
most people do not like confrontation, and would not say anything for awhile or at all, but be irritated with the situation. It is not right to put the responsibility on the non-owner neighbor. So, NO the neighbor is not required to tell her that her free-ranging chickens are pooping all over her yard bc as the chicken owner, she should be aware of where her chickens are and to keep them on her property.
The neighbor should give the chickens back, I agree with that.
I also agree that chicken owner may need to pay restitution of some kind....even if that is just elbow grease of cleaning off the patio of the neighbor or whatever.
She needs to be horsewhipped! For a grownup to take property from a child is absolutely wrong!
LOL. horsewhipping - rather violent don't you think? settle down.
Also, the parents are the property owners and the ones ultimately responsible for the chickens. I think that the chicken owners in this case just got careless and weren't really paying attention - not meaning any harm, but also were not paying attention to their livestock and where they were going.