I have lost 4 chickens in the last 4 months and I'm hoping this isn't going to continue! I just lost 1 of my silkies this morning! I had several adult chickens that were all over 1 yr old, I do not know if they were vaccinated or not, we had babys in April and kept all 9 babys and the mom (my very broody silkie, don't know if any of the eggs were hers or not) in our bathroom for about 6 weeks In the mean time our other broody silkie was out with all the other chickens in the coop sitting on 4 more eggs, we put mom and babys in with all the other chickens and my broody/ with her eggs in a dog kennel and after these 4 hatched I kept them all together but seperated them with a baby gate to keep them safe. Between 4-6 weeks 1 started to walk funny so I seperated it from the rest and I tried to nurse it back it became clear it was suffering and we couldn't let it suffer so it was put down, 2 weeks later it happened to another and we tried again to nurse it back and ended up putting that one down too. I contacted a specialist at Michigan state who said I probably have mareks in my coop and it would more than likely have come from one of my adult chickens. He thought my first batch of babys may have a natural immunity built since the babys were introduced to the flock after they had a chance to build some immunity, (currently there all health) and the other adults were possibly immune . 4 weeks ago my Rhode Island died all of a sudden, no symptoms at all that I noticed. She was our first chicken that wondered into our yard and started the whole lets get more chickens thing! We had her a little over a year before we got more chickens, we got silkies, polish, and a silkie/polish mix. We didn't know her age so thought maybe it was age related but she had been laying eggs up until a few days before she died, she ate fine and her poo seemed normal. The morning I found her it looked like she was on her roost and laid an egg up there because there was egg splattered all over the coop and wall under where she was always perched and I knew it was her egg because she was the only one with that that big/ colored egg. Now last week my silkie (that passed away last night) who is about 2yrs old puked up water when I picked her up! She is also the one that hatched 4 eggs this may. She didn't seem to have any crop trouble I checked her frequently after this, she has a little poo stuck to her butt but nothing alarming. She did seem a little thinner than usual so I have been making sure to feed her seperate several times day to be sure she was eating enough. I cooked 2 egg and mixed it with yogurt last night ( she had already eaten and her crop was pretty full already) but she ate it all, she seemed to be a bit wobbly last night like she had a hurt leg, but not paralyzed like the first two. She was also molting. ( the 2 babys that died she also hatched, don't know if they were her eggs or another hens) Was wondering if it was another form of marreks with the tumors or possibly something else, I would have thought it would be the same strain with the legs being paralized, not tumors? I can't open her up and look, I just can't! I can't afford the $90.00 to have it done either! Is there anyone out there that has had experience or knowledge that could help me? I cant begin to imagine loosing a chicken every 4 weeks, and certainly can't replace them if this is going to keep happening! Also thinking I may just give up and not have chickens again, they are my pets and it's so hard to loose one every few weeks! I would have thought since the chickens I lost to marreks presented with paralysis that if others were to get it it would show the same way? I've read everything I can find. Anyone out there have any experience with this?