Last Sunday, I put some medicine powder to my eight cats to kill flea. The second day, I found 5 of them began drooling. And I never met such thing before. On Tuesday, They still drool, and ate less, unwilling to drink water. So I give them dilute milk. On Wensday, I found one made worse, so I take it to vet. The vet was not certain what was the mater. She gave some injection to detoxifcation and a dropping. So it didn't drool and allay a fever. The other 4 cats became better, and ate a lot, but drunk little. I still give them milk now. But on Friday, I found the cat that I brought to vet drooled again. I'm afraid a lot if the disease is very serious. And what is the disease? Why they are unwilling to drink water in summer? How can I do in home?