There seems to be F1s coming from different catteries but how related the Servals are that those catteries have I honestly don't know. I have had F1s from DreamSavannahs and from AmazingGrace (now defunct)... I did ask Tina (of DreamSavannahs) if the Servals were related and she knew that they came from different Serval breeders so I'd guess they aren't related to at least one generation back... but because there isn't a Serval registry, there's no tracking of pedigrees. I don't know that anyone has done a study on this in Servals, although I was having an unrelated discussion with a Serval owner earlier today and she was talking about a professor wanting to do some DNA studies of them so maybe it is underfoot...it would be interesting certainly!