I took my dog to the vet she was diagnosed with vitiligo
thanks i will, i have had rotties all my life and its new to me also. I have heard of white nail turning darker but never the other way.
Now that's a new one on me. I honestly have no idea, but hopefully one of our other members will.
In the meantime, post your question to Dr. Cheng on the Ask a Vet board here at Med Help. Hopefully she'll have some idea as to what is going on. :-)