Towns can now control whether or not passive animals are able to spawn, in both a town-wide setting and a plot-by-plot level (with plots able to override the town setting). It works in a similar way to the mob spawning setting but for animals instead.
By default animal spawning in towns is still on, but to turn it off, as a member of senior town staff simply use
/town set animals off, and then
/town set animals on to turn them back on again.
By default in the individual plots they are set to use the town setting, but this can be overridden using
/plot set animals off and
/plot set animals on, plus to set the plot back to use the town setting use
/plot set animals reset.
This is only a small change, but it's something that has been brought up on a few occasions! If you've got any questions or feedback just reply.