I have a 7 month old hen that is having issues walking and using her wings properly. She is also having issues eating. It's like she can't focus on what she wants to eat and misses. She won't bend down to eat. I have to bring it to her face. I am also syringe feeding her water. I found her laying on her side last Thursday in the pop so I brought her in. I'm hoping this isn't Marek's disease. Any thought?