Hello, I have a 8 month old male dachound, he is so adorable! But I noticed that he has green oozing coming out of his penis?:eek: I don't know if that's a part of reaching the mating stage or what! What should I do? :confused:

It is common for males to have a small amount of discharge.
"Preputial discharge" is any substance flowing from the prepuce, which is the fold of skin that covers the penis. Often, licking at the prepuce/penis accompanies the discharge, so the terms interchangeably.
Preputial discharge may consist of blood, urine or pus. Having a small amount of whitish-yellow discharge called "smegma" is normal for a dog. Smegma is the normal sloughing of cells and accumulation of debris.
But smegma also provides nutrients for bacterial growth.
If your dog's discharge is really greenish, and you've never noticed discharge of that color before, it's likely the discharge is caused by bacteria, and dog has an infection which can be easily cleared up with an antibiotic. If the discharge is accompanied by a strong odor, that is also a sign of possible infection.
You'd need your vet to confirm the possibility of an infection, and to provide medication.