Also, my favorite in-depth link on crop problems. Sometimes the crop issue is the last thing we see before something else claims them, as mentioned above. But, if it's truly crop related, the info below has seen them through...
https://www.valleyvet.com/ct_detail.html?pgguid=30e07474-7b6a-11d5-a192-00b0d0204ae5&itemguid=3269e695-7b6a-11d5-a192-00b0d0204ae5
OR
https://www.jefferspet.com/products/feeding-tube-14fr
I would tube feed her. There are a bunch of videos and posts out there, so I won't go into the how-to's, but here's what I would have available:
1. Kaytee exact Hand feeding Baby bird formula - powder, sold at Petsmart
2. Puppy feeding tube - this is a tube that will fit on the edge of a...