Did she object to the chickens or the garden? I suspect just the chickens, rather than your back yard garden.
I was tempted to leave their corpses on her doorstep and egg the municipal building as a petty sort of revenge, but that would have been too obvious.
Those chickens were good eating, though, especially with some homegrown corn on the cob and baked beans. The squash didn't work out so well, unfortunately.
Never really bothered me since they mostly just hung out around the back fence far from my house, but finally another neighbor complained to the city and they had to get rid of the chickens. Chickens are allowed here (up to 10 per property), but have to be kept confined and on your own property.