If you take your cat to the vet for a "bacterial" infection, do NOT allow the vet to give Baytril (enrofloxacin) injections! It causes blindness in cats. The FDA and Bayer have not been informed of actual numbers of adverse reactions due to lack of vet/client information. Bayer (800-422-9874 or 888-765-3203) produces it and the drug label says "FOR DOGS ONLY".
In dogs, it is given only as an initial dose, with pills to continue treatment. Three of our family cats were dosed at a dog's weight twice their own. They are all DEAD now!
Floroquinolone antibiotics CAN cause crystals in the urine, stones, blockage, renal failure/rupture and death! Antibiotics are ONLY appropriate for bacterial infections!
Have the vet show proof (labs, WBC, pus, wound, pneumonia, UTI, urine,etc). Lab books in the public library that explain your labs/tests, are the same for animals (ranges vary). Drug resistance infections can occur in pets and transfer to humans. The intestinal infection can kill people with decreased immunity (cancer, AIDS,frail, meds). For 10 years the FDA has repeatedly refused to allow BATRIL in feed for animals used in human consumption because of transmission of bacterial resistant infection. We get it by cleaning litter boxes and dog waste.
Editor's Note: I did some searching for information on Baytril and it does appear that it may have adverse effects on cats, especially if an improper dosage is given. If anyone has any more information about this, please post it below.