We could take a lesson from the squirrels (ok, insert nuts in the nation's capitol joke here) in DC. Seems black squirrels were brought in about 100 years ago, and according to the Washington Post story:

He (retired University of Maryland professor Vagn Flyger) has studied their behavior ... and determined that the squirrels don't appear to treat each other differently because they are black or gray.

"They don't seem to care," he said.