Hi, my 12 week old puppy has what I assume an infection/pus coming from his sheath. Noticed it this afternoon. It's grass green in colour in parts! Much darker to the naked eye than the pic denotes. So concerned about this. Did phone Vet's but they are now closed until 9 in the morning. Will phone back then. Can anyone shed any light on this or have had experience of such a thing. Worried and fretting here. Thanks in advance