So two weeks ago, I ended up having to put my dwarf rooster down. I never actually figured out what he had but it was an awful sight to see. After some research, it seemed a lot like Newcastle's Disease with his last few days. The weird thing is that my two other hens are perfectly fine (as far as I can tell.) So. One of my hens had this horrible, horrible smell when I bought her. At first I thought it was because of where I got her. It's literally been two months and she still has this foul smell -she's active and eating. Although I have noticed her growth is severely stunted... (I can't help but find her extremely cute but I'm really concerned -she's the size of a twelve week-old hen.) All three of my chickens didn't respond to the Duramycin10 I was giving them... So my question -what medicine should I try now? Online and from previous responses, Coryza or MG were the only disease I found that had stunted growth and smelly symptoms. (Those are the only two symptoms she has -the other shows none which makes me think she's also a carrier.) This smell NEEDS to go away! Also, what's the difference between MG and Coryza..? I'm new to this, sorry. Last -how would I go about getting more chickens if I ever wanted to? Or if I even can? Despite the circumstances, I'll keep them anyway. They're more of pets than anything. Thanks!
If you choose to keep them, you need to keep a closed flock. That means no bird or egg for hatching should ever leave your property. After they are all gone, you can disinfect and then get other birds. I would research carefully hot wo do this in order to prevent the new birds from getting the same disease. If you bring any new ones in, it is likely they will also get the coryza or whatever it is. This is a fairly good overview of these diseases, but not a detailed source. You can also find Merck's veterinary manual online for free, and read more in depth about any disease. http://edis.ifas.ufl.edu/ps044
Di-Methox or Albon which are brand names for sulfdimethoxine are what you need to treat for coryza. Most people with coryza will choose to cull their flock, and start over, because they will either get it again or pass it on. MG usually doesn't have a bad smell.