I just got a new ferret yesterday. He is fixed and eight months old. I just found out yesterday that he is deaf (blaze marking). 

Some symptoms are:
>Frequent sneezing
  -I just vacuumed my (carpeted) room in case the dust was bothering him but he continues to sneeze
>Scratching
  -He scratches behind his ears (they're clean) and his lower back
>Not very playful
  -He is very friendly (hasn't nipped or bitten at all, loves to cuddle) but doesn't seem very interested in his toys
>His poop is solid but slightly watery OR almost clumpish
  -Dark brown with some lighter, orangish tones
  -I'm in the process of litter training him and when he backs into a corner I put him in his litter box. It takes a few times though because he gets up, walks around his cage, then moves back to the corner he was originally in (his box is in a corner)
>He seems to only wake up to walk around for 5 to 10 minutes or to go to the bathroom, but not to play.
>Loss of appetite?
  -When I first got him, he didn't eat the entire night though I put out his food (the original owner gave me a bag) and water

 His litter is shredded newspaper and his food (I plan on giving him more meat) is a high quality adult cat food. Please let me know what you think. If you need more details, let me know

Hello and Welcome to the forum! It could be your new little one is just getting used to the new surroundings. It takes a little time to adjust. I would find you a good ferret knowledgable vet and take your little for a general checkup. 

As far a second the cat food it depends on the brand. I buy Wysong Epigen ferret foot/Go Fit & Free cat food and Orijen cat food and mix then 3 for my younger one. My older one gets Wysong Epigen 90 Digestive food. His funny poop could be from the switch from the pet store food to what you aren't feeding. You want to switch slowly. Mix the 2 and gradually eliminate the old. I order my food online from chewy.com

 
Fuzzbutts Rule!

How  is your baby doing?

 
Fuzzbutts Rule!