My 3 week old Olive Egger has been down and out for the past 4-5 days. She was not drinking or eating and would just stand under the heat lamp with her eyes closed, neck tucked in, wings a little droopy, and feathers a little fluffy. At first I thought she just needed some nutridrench so I started her on that as well as giving her water via syringe. She seemed to perk up a little after two days, she walked over and started to eat.
Well, I noticed that while she was eating she would stop and shake her head because the food was sticking to her beak. The next morning I noticed clear slim or maybe mucus in her beak. It's not dripping out or anything, nothing from her eyes or nose. Just in her mouth. I did my best to clear it out of her beak before giving her water and NutriDrench which seemed to help some.
This evening she wasn't able to drink the water very well because of this clear slim stuff in her mouth. I tried to give her hard boiled eggs but she wasn't interested. I'm not sure what to do. She will also peep ever so quietly, when I hold her to give her water.
All other chicks are fine, she is now on the smaller side. Any advice, would be highly appreciated!!!
***EDITED TO ADD***
I also started her on Corid on day two after one of my other chicks pooped clear watery poop with blood in it. I did the whole flock, but her's is via syringe. She had pooped two times that I saw and both were watery. I figured because she had not eaten for a few days but was getting water. She also sleeps standing up, she doesn't lay down like all the other chicks.