That´s really interesting. I´m not so sure the vets here know these things. Baytril is widely used. For example, the gov does a neutering campaign now and agin for female cats and dogs. They all get prescribed Baytril. I don´t know if they give the same doses, I can´t remember. I had 4 of mine done during this campaign. 3 of the cats (sisters) have a slight cloudy look to their eye lenses. My other one doesn´t have it, nor our male that we got neutered separately, but they were all given Baytril. The vet guessed it might be congenital, but now I´m going to ask her about the amounts of Baytril and see if she knows this. thanks for this info, very interesting.http://www.animalhealth.bayer.com/5161.0.html
"- Retinal Toxicity in Cats
It is well known that old quinolones, such as nalidixic acid, may affect the eye as a potential target organ (6). In this connection alteration of the lens or melanin-containing eye tissues (retina, iris, ciliary body) have been reported from human medicine.
As a matter of precaution Baytril therefore has been evaluated in ophthalmoscopic and histopathological studies on laboratory animals, dogs, and cats. Those toxicological studies with repeated administration of high doses did not reveal any evidence of unwanted effects on the eyes of the animals examined.
Sporadic reports of blindness in cats previously treated with Baytril, however, have been received mainly from the US in the last few years. In an additional safety study on cats Baytril was given over 3 weeks at different doses (5, 20, 50 mg/kg body weight) once daily. No adverse effects were observed in cats that received 5 mg Baytril per kg body weight. The administration of doses of 20 mg/kg body weight or greater caused salivation, vomition and depression and additionally resulted in mild to severe fundic lesions on ophthalmologic examination, changes in electroretinograms (including blindness) and diffuse light microscopic alterations.
It has therefore been recommended to treat cats with Baytril at daily doses not exceeding 5 mg/kg b.w., which is the officially registered dose in most countries of the world.
In contrast to cats there is no evidence that visual alterations can also occur in other species, e.g. dogs."
-Kathy