Fascinating Saaniya! I had been feeding my sick chicken (that seemed to be suffering from worms perhaps) chunks of garlic and yogurt with olive oil. And yes, I gave her Nutri Drench (a vitamin supplement) and she miraculously healed from her ailment. I will add basil to my health remedies!
Sounds a lot like Virulent Newcastle Disease. My kids are in 4H and we just received this announcement of VND discovered in southern California- :( hope not but FYI HERE: http://ucanr.edu/sites/poultry/Virulent_Newcastle_Disease_Outbreak_Information_and_Resources/