In March, I bought some chicks from a Farm & Ranch store. All have been healthy except 3. They developed watery clear diarrhea and over time are slender and have low weight. I gave them the recommended medicated chick starter. Still diarrhea. I wormed them with Wazine 7. Still diarrhea. I gave them the recommended antibiotic treatment for 7 days. Still diarrhea. I mixed crushed red pepper in their feed. Still diarrhea. One chicken now has a little more solid poop. The other 2 are the same with clear watery diarrhea. I have read and searched for an answer. What is wrong???