Hello; my family was given a hatchling desert tortoise from my father’s ex-colleague over two years ago, and we’ve never had any issues with husbandry. Her name is Shelly. During Shelly’s younger years, she had an inside enclosure, but as she got older we’ve shifted to burrows — with success, and some hardships along the way. My yard is fairly large, and over half a year ago, we were given a female adult Desert tortoise (15 years old) by a moving family who had four. The friend had a very large yard, but the tortoises occupied the same burrow. Toto, my newest addition, is quite feisty. She came into the family in a not-so-great condition, as she had an untreated respiratory infection, but that’s been taken care of. Since we were unprepared for brumation season, both the tortoises spent their brumation indoors, and now that they’ve woken up, we’ve faced an issue. Toto is quite terrotorial, and she bobs her head at Shelly. Previously, Shelly has just ignored her — and they didn’t have frequent contact. Toto has never gone further than bobbing. We rebuilt Shelly’s burrow in her old spot underneath a pomegranate tree, but she wasn’t a fan because it was too large — and one day, we saw Toto digging at it and trying to enter! So we decided to give Toto the burrow, and we moved Shelly into a more narrow burrow, right against our brick wall and a boulder, and planted a pomegranate tree so that she’d have enough shade. Since she was previously digging a small crevasse underneath the boulder, she adapted to her new burrow very well. But yesterday we faced another issue: I saw Toto trying to dig into Shelly’s burrow once again, and once I removed her, Shelly sprinted from the burrow so quickly you’d think she was on fire. I’ve never seen a tortoise move that quick. So, obviously that’s a very big problem. As of now, I woke up early to check on them at 5:30 AM (I live in Nevada and the sun is out by then), and I see Toto at Shelly’s burrow once again, and Shelly is walking around the yard. Previously, around this time Toto would be sunbathing and Shelly would be lingering at the front of her burrow, but obviously Toto has disrupted her. I want this to end now because I don’t want Shelly to be put through this stress. What should I do? I have the option of putting one of them on the other end of the yard, but I’m wary of that because it’s the side where the gate is at, and I’d most likely have to relocate Shelly’s burrow. Shelly is still small and she has the tendency to squeeze into very tight spaces, which makes it difficult to locate her (Once we had such a difficulty finding her that we had to recruit the neighborhood kids into the search, and one of them found her completely vertical against a wall and a plank of wood.) What can we do? Rehoming Toto is the absolute last thing we’d consider. We’d like to retire all of our options first. Toto is unable to get into Shelly’s burrow as it is too narrow, but I don’t want Shelly to face the stress. Thanks in advance. Attached is Shelly laying in the entrance of her burrow, and Toto eating some food.