Electrolytes should not be given continuously.
Not sure daily yogurt is beneficial either.
Put her back on regular chicken ration and plain water.
Isolate her to check crop function, physical exam first.
I'd isolate bird in a wire cage within the coop for a day or two....so you can closely monitor her intake of food and water, crop function(checking at night and in morning before providing more feed), and her poops. Feel her abdomen, from below vent to between legs, for squishy or hard swelling.
Best to put crate right in coop or run so bird is still 'with' the flock.
I like to use a
fold-able wire dog crate (24"L x 18"W x 21"H) with smaller mesh(1x2) on bottom of crate under tray.
Then you can put tray
underneath crate to better observe droppings without it being stepped in. If smaller mesh is carefully installed, tray can still be used inside crate.