Ew. I don't know anything about impacted crop. One of my SLW had a crop that looked like that though, for two days. She looked REALLY bizarre and off-balance. But then it disappeared. So... no idea. Hopefully someone here can offer some advice.
I put a handful of eggs under my broody, Honey (EE), a couple of weeks ago. They were from Farmerboy's sussex hens he sold me that were still possibly fertile. I wasn't very hopeful for them since it had been two weeks since I bought the hens but that's when Honey went broody all of the sudden so I tried anyway. What the heck, right? Well, Honey turned out to be a lousy broody. She was so temperamental and would leave the nest for an hour at a time and come back only to sit on the wrong nest. Luckily other hens would come and sit on them for a bit so I think they stayed warm enough. I decided to put her in her own pen to cut the distractions and competition from hens wanting to lay eggs with her, thinking that would help and she freaked out. So that didn't work. But Custard, my BO hen, so conveniently went broody too and so I gave the eggs to her instead. Custard is a great broody, almost too good. She doesn't budge so that I often wonder if she's dead. I have no idea if she's eaten or had anything to drink but she's still alive and has both food and water within reach so... I checked the eggs today and two of the five are alive, one from each of the two sussex hens. One more week to go and we'll see what happens.