Hey guys, so I have a flock of 7 (2 silkies, 3 Rhode islands, and 2 silvers) and one of the Silvers is pretty sick. 2 weeks ago, I noticed she was extremely lethargic. We just had a mite infestation that we took care of with DE, so I assumed she was just recovering from that. Then, she began losing a lot of weight and I noticed she was no longer free ranging throughout the day, but just sitting on a hay bale or in bushes all day. Then last week, I brought her inside because she was getting picked on by the other chickens. When I held her, I noticed just how small she has gotten and she was hardly walking very wobbly. I dusted her with some DE and fed her some in her food, (it's food grade DE) just in case it was a parasite. I have been doing that now for almost a week and she isn't improving. She can still hardly stand and is very wobbly. She is eating and drinking well though, and she seemed to be doing better until today. This morning, she started gaping her mouth when she breathes in and it sounds kind of like a quiet wheeze. I don't have the money to spend $200 to take her to the local vet, and I'm not sure what to do. What do you guys suggest? I heard Tylan 200 may be what I should use if its respiratory..