But cornishchickide said theyre related so thats prob not the best idea to breed them directly with each other but if you could try and get lucky to find more citrons that would be great. But I guess you could try silvers but then those babies may not breed true and by the time you are able to breed them back you probably would be able to find more!......hahaCitrons are their own color variety and breed true when crossed together. No outcrossing with Golds/Silvers is necessary.