A week ago I decided to worm our 9 mo old chickens(13 of them) with Valbazen, thought it would be a good time to do it as egg production is down and wouldn't be tossing so many eggs. 3 days later she come down with vent gleet most horrible thing I have ever smelled, white runny fluid draining out of her vent, vent is red and swollen with yellowish stuff stuck to vent. I researched on here pictures and descriptions matched vent gleet descriptions. So I got some miconazole and put on her vent and just inside of it. There is ACV in water and gave her some probiotics, with yogurt. She started to make these foul smelling chicken farts in the coop , didn't move around much, didn't want to eat or drink much. This is unusual as she is a BULLY, would harass others whenever she felt like it and she wasn't doing that. She continued to be lethargic, felt her crop would be nearly empty with just a small amount inside it, poo was runny green with alot of white (figure it was miconizole being pushed out too). There were dead round worms in her poo not moving so Valbazen was doing its thing. Today when I went out to fill up feeder and check water she looked worse, wouldn't even run when I came near her just sat there giving me the stink eye . I picked her up she didn't fuss much her crop nearly empty and was warm under the feathers no sign of mites or anything else other then the drainage from her vent, though this had slowed down and wasn't as bad as it had been. I had to go to town to get more feed and was able to talk to the Chicken Man at Coastal for advice. He advised to force feed her as she wasn't eating and had lost weight over the last 2 days. I got the lamb catheter and syringe 14g was under 3 bucks. He suggested getting crumbles and liquifying them down with some probiotics and vitamins. Also the food for baby birds at the petstore. I came home set to making the mess for the chicken, went back out filled up feeder was almost empty, She was sitting but had moved from earlier though not far. Her comb was tinged blue and flopped over, breathing kinda labored. Picked her up and abdomen felt squishy, warm under feathers but cooler then others. I managed to give her some of the liquid through the tube, she did protest the feeding tube. About a 1/2 hour later I go back to check and she is on her side legs out and breathing even more labored. As I picked her up she died. Curious to know if the worming killed her or not or something else I may have done like tube feeding her killed her I did a quick necropsy. She would have died anyway! There was no fluid in her trachea so I didn't get any fluid in there. There were dead worms in her intestine but she hadn't voided them may have been reason for her being gassy. There was small amount of fluid in her abdomen along with 3 egg yolks. One had been there awhile and had sort of solidified and broken, the 2 other yolks were still intact but not where they should have been and kind of solid. She had an egg in the chamber to get an eggshell and was still leathery with no shell. The abdomen smelled foul from the egg yolks and fluid in her abdomen. She showed no signs of swelling on the outside of her abdomen. I came to the conclusion that she died of Internal egg laying. She did not smell the way a chicken should during processing and the evidence of the yolks and fluid in her abdomen were proof. I couldn't take pictures I was only one home and hands covered in goo. I guess an internal layer doesn't need to have an extended abdomen to die from it. Just information I thought would be helpful.