I have a 3 week old serama chick that started constantly peeping yesterday. she has been outside with her broody mom and 2 siblings with medicated chick starter, shelter, water etc. all have been well until yesterday. her breathing is starting to sound clicky/wet and her tail is bobbing hard when breathing and chirping. don't see any sores, eyes/mouth throat appear clear. crop is empty. i brought her inside (by herself) with heat lamp etc. she can't keep up with the others right now and seems to be getting cold because mom & siblings are very active and running around in their outside pen. Not sure when she last ate drank. I am holding her now and she's resting as she cries constantly if I don't, and I'm worried about stressing her further. any suggestions for chick meds/treatments? i have VetRX, antibiotic, sav-a chic electrolyte (although I've never used it) ....not sure what to do since she's so tiny . please help if you can!