Maine Coon
Outcrosses that are "impermissible" according to the TICA breed standard breeds include the Bengal and Maine Coon cats. These impermissible breeds can bring many unwanted genetic influences. Outcrosses are very rarely used as of 2012, as many fertile Savannah males are available for studs. Breeders prefer to use a Savannah, rather than a non-Savannah breed, with the serval to produce F1s in order to maintain as much breed type as possible.