Can hit her with a round of prazi pro in the water column for safe measure… if shes still eating it works much better IMO when digested and is very safe. Soak her food it in for a few feedings. Pups should be offered food 2-3 times a day and their stomach/back should be taller than their eyes. A “good rule of thumb” to make sure there full enough. A ray will almost never refuse earth worms. Quickest way to bulk them back up if/when needed. I think i read u were feeding frozen mysis shrimp when u got her. Shed need 5-10 cubes every day. I always started my pups on mysis, they need alot of it tho. Once a ray gets too thin they start to deteriorate. Any signs of hip bones or dent in between the eyes? Rays are very hardy IMO and can handle pretty bad water at times… gotta keep them full/healthy tho or theyll drop like flies if anything else is “off”… the tallest part of their body should b their back. If they dont have a “backpack” lol… safe to offer more food until they do. They can only pack in so much in 1 sitting some times, y its good to offer as much as theyll consume a few times a day when there small. Hope she turns around for ya.