[anonymously]

@Circa Rigel

I have a small breed dog that I decided not to neuter (undescended testicle).
That plan backfired as he developed a tumor in his descended testicle at age 11 and had to go through the whole process then and although he had a difficult recovery, he is still around at 2 weeks shy of turning 16.

Some info here: http://skeptvet.com/Blog/2016/06/selected-effects-of-neutering-in-german-shepherd-dogs/