You are probably right BV, I know Kenya does have a high Bosc's population, but I am not 100% sure where all the bosc's come from I just now they are 'farmed' and sent around the world. I will double check with a reference I have at home about the exact location.
I have heard of Bosc's eating veg and fruit - are these friends of yours Portuguese
I don't see a need to find a monitor these types of food but to each their own I suppose. There is still a lot to learn from these animals that we don't know, the courting that Jeff and I experienced with his male on my female was also something that I haven't read or heard about. I know of someone who had a pair also mate, the female dropped unfertilised eggs before the mating but nothing has come of this since. They definitely have an ovulation period and I think its about timing as well as environment.
BV - please could you send me those pics of them mating, I would love to see them and also if they had any information of what they did before the mating (ie light cycle, humidity, feeding).