Which state is this in? In the ACT, and I think some other states, a unit owner may only allow an animal to be kept with the owners corporation’s consent but that is balanced by an obligation on the OC that consent must not be unreasonably withheld. Bylaws/rules/articles can only have effect in such circumstance if they are consistent with the Act. EG. It might be reasonable to exclude unusually large exotic or dangerous animals or more than some number of animals. It would not be reasonable to have a no pets policy. It might be reasonable to require animals to be confined to the unit area and only allowed on common property under the supervision and control of a responsible person.