Hi all... I would like to know at what age tortoises can begin to breed as my 2 are very young, possibly 18 months to 2 years old. As they are too young to tell the sex of them and as they are different sub-species, which I have found out on the internet can be very dangerous for sub-species to cross-breed, I want to make sure this doesn't happen but haven't found any information to tell me when they may start becoming interested in mating after hours of trawling the internet. Advice would be greatly appreciated with this so that I can separate them in their enclosure if and when necessary... Thanks in advance