Of course a healthier tortoise could produce more fertile eggs as well as larger clutches, but all things being equal, I cant see where mazuri acts like a fertility drug.
Balboa said:
Hmmmm totally off the cuff here guys.... but I see a fine, indiscernable line between egg developement and fertility. Strictly speaking "fertility" refers to a viable union of sperm and ova, so yes Mazuri may not have much influence on that (except that maybe a healthier tort may produce better sperm or ova). Poor developement however could present as infertility, how can you tell "why" the egg didn't hatch?
Seems to me that all in all diet will be crucial to a good breeding program, and that's where formulated diets shine.
Of course I'm a long ways off from a breeding program, so all just speculation on my part.
