Yes, if her eggs had been full term, they would have been dark red, and you would,have seen them bulging under her, slowly working their way down her swimmerets. Some shrimp lose a first brood, not sure why, but diet is a suspect in any artificial setup.
They are filter feeders, which means much of their natural intake is invisibly tiny. Microscopic organisms. If you can get some, microworms are very easy to culture and can be fed a few times a week. Fish like the worms too. If you can get frozen food, like baby brine shrimp or bloodworms, it might work if you made a smoothie of it in a blender, froze it again in small chunks and fed it thawed to liquid. The problem with this is that most of the nutrients become so diluted so fast, they don't get much good from it. Daphnia that are frozen lose almost all their value within seconds of hitting the water, sadly.
I culture single cell liquid algae for mine, about five different species of it and feed a couple hundred CCs a few times a week. NLS smallt from my fry starter is one dry food that works, if you have to use dry food. So do Golden Pearls, in the 5-50 micron size, which is a shrimp specific food, though mainly for farmed shrimp larvae, it works for the filter feeders. Can be ordered online.
Mine will hang in the the current from my AC, I put wood or something for them to grab in the strongest part of the current, as well as run a separate circulation pump for them, with a flat filter sponge suction cupped to the side of the tank right in its path, which they love to hang onto. I turn the filter off for about a,half hour after I feed liquid algae, so it won't get filtered out too fast. The pump keeps it all going around, gives the shrimp best chance to filter it out themselves.
