My Silver Laced Polish (Stubbie Nubbie) was sitting in the coop by herself yesterday afternoon. Today, she is too quiet, and has started panting and her wings are drooping. There is no discharge out of her nose, or eyes. I've also checked her over for injuries and have found none. She is 6 months old and has not started laying eggs yet. I gave her some yogurt and added ACV to the water. Any advice would be greatly appreciated. She is my 8 yr olds favorite hen.