Do the best you can to separate them ASAP, as it doesn't matter if you feed them separately at all, that's really not the issue. Medical/health issues are no doubt being caused by them being housed together, it's due to the stress inside the tank and you can't "see it" happening, but it's obviously happening, it always does. If you can buy a 60 liter plastic tub at Walmart for $10, put paper towels in the bottom as the substrate, buy a $6 clamp-lamp at Walmart also (8" one, they are located in the aisle with the extension cords and electrical/wiring stuff), and buy a 100 watt Halogen Indoor Flood Bulb for it, or even spend $5 at Walmart for one of the 75 watt reptile neodymium basking bulbs they have in the aquarium section near the crappy, freeze-dried insects, that will due as a temporary basking set-up for the time being, just either use a piece of tank decor you already have as a basking spot/platform, or find some rocks or a log/thick branch outside, preheat your oven to 250 degrees and then bake the rocks or wood for 45 minutes, this will disinfect them and kill anything and everything in/on them, and you've got totally free tank decor. Then you just need to either share the long UVB tube you already have (if you can put the tank and the tub side-by-side and tape up paper to the sides of both so that they can't see each other), or if you don't already have a long UVB tube you can share over both the tank and the new tub (I hope you already have a long UVB tube), then you'll just have to come up with about $40 to buy one, you can buy the Zilla 18" T8 Desert 50 package deal at Petco for $40, it comes with both the 18" UVB tube and a fixture with a reflector for it, it's the cheapest package deal I know of, however they do come with a stupid, literally fatal clear, plastic cover on the bottom of the tube fixture that covers the UVB tube inside the fixture, this must be immediately removed from the tube fixture before putting the UVB tube over the dragon, as no UVB light can at all penetrate either glass or clear plastic...
I think Knobbys said it best, I hadn't every worded this situation the way he did, but I will from now on, he said that housing 2 dragons together, no matter what their genders, is a "Ticking Time-Bomb", and that's exactly what it is. It could happen today, tomorrow, next month, next year, but it will happen, and the problem then becomes how will you afford to take a severely injured dragon that needs emergency medical care to a vet? One bite can require thousands of dollars of medical treatment. So that's why we're trying to help you now, because the little bit of money you'll need to spend now to separate them is nothing compared to what it's going to cost you if you wait. At that point your only option will be to surrender the injured/sick dragon or dragons to a reptile rescue who can get them the urgent medical care that they need. So spending under $100 now will literally save you thousands, and is the only way to ensure that both your dragons will remain safe and healthy. And the health problem that she is now suffering from is no-doubt related to the stress she is under.
I think Knobbys said it best, I hadn't every worded this situation the way he did, but I will from now on, he said that housing 2 dragons together, no matter what their genders, is a "Ticking Time-Bomb", and that's exactly what it is. It could happen today, tomorrow, next month, next year, but it will happen, and the problem then becomes how will you afford to take a severely injured dragon that needs emergency medical care to a vet? One bite can require thousands of dollars of medical treatment. So that's why we're trying to help you now, because the little bit of money you'll need to spend now to separate them is nothing compared to what it's going to cost you if you wait. At that point your only option will be to surrender the injured/sick dragon or dragons to a reptile rescue who can get them the urgent medical care that they need. So spending under $100 now will literally save you thousands, and is the only way to ensure that both your dragons will remain safe and healthy. And the health problem that she is now suffering from is no-doubt related to the stress she is under.