Can I use formula 911 for my sick cat? I have six cats, and which two of them are sick with an upper respiratory infection, and neither one of them will eat or drink. I took them to the vet and they did not help me. I need to find out if this is safe for my cats to take! The Vet has tried multiple different antibiotics which none of them have helped. It’s been two weeks and they have survived off of IV fluids at the vet