Cataracts More Condition_treatment How Can You Tell If A Dog Has Cataracts?

How can you tell if a dog has cataracts? - cataracts more condition_treatment

I have a Rottweiler than 10 years, and when I last year, our vet said he had a blue tint to the eyes, which said it was normal for older dogs. How do I know when you start the development of cataracts?