If a dog has the green pus coming from his eyes could it be contagious to a puppy and could this be serious?

Answer 1

The green pus is mostly dead inflammatory cells and tends to be non-infectious. However, if the cause of the inflammation in the dog's eye was infectious (bacterial or viral are most common in dogs), that infection is very likely to be transferred to a puppy and you may see similar pus coming from the puppy's eye in a few days.

I would suggest taking your dog to a veterinarian if this is new and you aren't sure what you are seeing - there could be a foreign body in the eye or a serious infection that needs to be treated to prevent blindness.