Monique, thanks for weighing in. Always appreciate anything you have to say! This year is the first year I've had to battle cocci. No matter how much sanitation, it just seemed inevitable for every batch that hit the ground. Even Sulmet didn't do it for them, nor did Corid. The milk products like buttermilk and yogurt seemed to help as much as anything. Now, I have some raw goat's milk frozen and ready for the spring chicks since that is really the best for this. It has been a bad year in many ways, with internal laying and losing Hawkeye and several of my older girls and Velvet, too. And then the cocci drove me crazy. That grow-out pen is vacant and before anyone else is in there, I'm going to lime the heck out of it and try to change the pH in the soil a bit. Not sure if it will help, but at least it's something to try.
All that wont help Cassidy now, though. When her brother was ruffled up and looking lethargic from his bout with it, she seemed fine, except that she didn't grow as large as I expected. Her sister is about 1/3 larger than Cassie and laying just fine.
BB, I do use garlic with the birds on and off. If Cass seems the same tomorrow, I'll decide what to do next for her. The AviaCharge 2000 they have in the water now is a great vitamin/mineral supplement for birds and has most everything they could possibly need, though I doubt it will help if the heart is really damaged. Thanks for your input!