First off, puking is bad! I really recommend separating that particular female from all the other geckos immediately so the other geckos don't catch the disease if there is one.
Always wash your hands after doing anything with that gecko before doing anything with the other geckos. Don't take leftover crickets out of that gecko's cage and put it in another cage.........keep her as quarantined as possible. Keep it sterile as possible........use newspaper or paper towels and change them every time they are soiled. Don't allow insects to nibble on her poop or regurge as that will cause the parasites(if there are any) to get back into the system. I recommend getting a fecal sample when you're able to and taking it to your vet. To me, it sounds like cryptosporidium or coccidia, which are intestinal bacteria parasites. Fortunately Coccidia is highly treatable if caught in time.
Most importantly, give your geckos choices! Let them decide what temperatures they can access. A cool side of 72-75 F (about room temp)with access to a localized hot spot of about 88-90F F provides a thermal gradient spreading over 20 degrees F. Provide hide spots all over so they feel secure. Other than that, there's not much to encourage appetite.
If these are new animals, then give them time to adjust to their new surroundings before expecting them to eat everything in front of them.
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1.0.0 Lampropeltis getula holbrooki
0.1.0 Lampropeltis getula californae
0.0.1 Lampropeltis getula nigra
1.0.0 Lampropeltis mexicana thayeri
2.3.0 Eublapharis macularius macularius
0.0.2 Rhacodactylus ciliatus
0.1.0 Gerrhosaurus major major
