My dog has a retained testicle also. I was told between 12 to 18 months. We are doing the OFA xrays at the same time. so he'll only need to be put under once. My dog will be just over a year old.
They say after 2 years the odds of cancer increase in the retained testicle.
Riley - 11/05/2012-8/30/2013 (Myasthenia Gravis)
He will always be in my heart.