You should be fine. Excessive breeding is really only an issue when it starts to lag your game. Having one if each color is fine. If you do have a lot of animals, spacing them out can also help reduce lag.
I never really knew how "excessive breeding" was dealt with. If the mods find a hot spot for lag, do they trace it down to a large amount of animals? Is there a limit to how many can be bred?
There is a tool for locating an area with a large amount of entities. We will kill any animals if we find excessive amounts.
