my 7 week old puppy is sneezing green mucus, won't eat and has a high temp...
Hi
With these symptoms your puppy needs to be seen by a veterinarian and quickly. He/she could already be in serious trouble and only a vet can give you a diagnosis and recommend treatment.
Little puppies can get very sick, very fast, (even die) if they aren't treated properly, please get help right away.
I wish you the best of luck and hope that this little one makes a full recovery.