You only gave her about 1/2 inch of cream right? Do that 2 times a day for 7 days even if she feels better.
Since the crop looks Pendulous, I would expect it to feel bubbly and/or fluid filled - what happens with a pendulous crop is the crop stretches (it's a sac/pouch that holds food/water) - it is stretched low and sort of "hangs" (Pendulous). The contents of the lower hanging part cannot "empty" into the proventriculus (stomach) and on to the gizzard, etc. What you are feeling is it's not draining completely. A crop bra helps to push the stretched crop up so it can empty properly. If food/water sit in there and don't empty, the crop will turn bubbly, doughy and sour.
You may be able to understand with the photo below - the red cirlce is the crop - see how it's a pouch? It has to empty into the tube/opening (yellow arrow) that goes to the proventriculus to be processed. If part of the crop is hanging so low or is stretched, then the contents remain in there. Make sense?
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