In any case, outcross matings provide the benefit of masking deleterious recessive alleles in progeny. Any such outcross matings were to be carefully monitored. They later imported another stallion to use as an outcross, Siglavy Savona. In fact, Hortaya breeders try hard to achieve the farthest possible outcross. Only one outcross is allowed (to obtain Lp or Appaloosa pattern). The Dutch kennel club approved the outcross program in 2012. Savannahs are always A, since the father is a nondomestic outcross (the serval father). The Balinese and Javanese were eliminated from the acceptable outcross list in 2005. In addition to that, the occasional "outcross" adds an element of hybridization to the mix. Graham included "a single outcross of Tibetan Wolf Dog". Two types of outcrosses are used in the outcross program. A means one parent is a Savannah and the other is an outcross. Siegfried & Roy performed at least one outcross. Outcross pollination is beneficial as it increases genetic diversity. The outcross is performed and the F1 generation is produced.