Hello Kura. Actually, you have misquoted or possibly misunderstood my statement. I said that it would NOT be likely that captive male tortoises could be made hot enough to make them become sterile. If they reached a temperature which would permanently sterilize them, I believe it would most likely also kill them (well, I suppose dead is almost equal to sterile), but hopefully you understand what I mean. Star Tortoises in my collection pile on top of each other under 250 watt infrared heat lamps twice daily. A temperature gun reading on the substrate under these lamps routinely shows a temperature of 114-116F. The tortoises are even warmer than the substrate, and I have never had any fertility issues.

When your two males are "having at it", remove one of them and quickly replace it with the female. This might do the trick for you. Even more effective, I would keep the two males totally apart. Keep one male with the female for a week at a time, and keep the other male by himself. Once a week, switch the males. You should see much-improved interest in breeding.

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