I agree that you may wish to go to the planning/zoning department and challenge your RE-1AA designation into an AG (agricultural one) or flatly state that you are plus 5 acres and can follow those rules (which Storm has kindly supplied as up to 40 flock animals on 1 acre).
As to whether you...
...oh and your neighbor may be zoned differently which is why he is acting differently. I am in an area where opposite sides of the street can be zoned differently.
What your tax statement list you at is what you are zoned.
Also your neighbor may be more than 5 acres.
LofMc
I'll help bump this along so you can get someone who has direct experience.
Also if you want to call out a particular member, type "@" sign with their call name, and it will send them an alert.
Being an ex-paralegal, I'll take a stab at this (with the caveat that this is NOT legal advice just...