I must agree with "Allpeepedout". Despite being legal, people can still complain about noise, smell, blight - and those are likely completely seperate ordinances. And officers are required to check out all of these complaints regardless of how crazy. Not that anything may ever been done (citation, order to quit, etc) it can become ridiculously stressful. I live in a VERY urban area and am fortunate to have an unusually large lot. I have 4 alpacas and 27 chickens. (BTW I find that letting my chickens out VERY early, i.e. 5:30, with lots of treats tossed around has virtually eliminated the usual daily a.m. ruckus. The later I waited the more frustrated they became...)
Every neighborhood has some jackasses, so I certainly didn't want to advertise my zoo. However, I have invited immediate neighbors over to meet the animals - esp. those with kids - and had the kids help me name the chickens, showed them how to collect eggs, etc. It has been a huge hit (it is surprising how many people have never seen/met a live chicken...). I do give eggs, and they in turn give their extra veggies, etc. It really has become a nice co-op sort of atmosphere here in the middle of urban America.
I'd just go ahead and fall on my sword and reach out to the neighbors. Once they realize you are a decent person who doesn't intend to inconvenience them the noise issue maybe all of a sudden become no issue at all.