My 11 year old Chihuahua mixed has been diagnosed with cataract on one eye. I'm wondering how many of you would recommend having surgery. Is surgery necessary? Will my dog be having pain and unable to see with a cataract? What are the side affects if I was to have him go through surgery? What if I just let him be and not go for surgery? I'm so confused. But I want the best for my dog. Any advice?