Two days ago my ferret was fine he seemed to have energy and was playing and everything and today he is very lethargic and seems to have gotten skinnier. He won't eat the only thing he will eat is his furo-vite. The vet in our area doesn't take ferrets as patients and there isn't any close by that do. Does anyone know what might be wrong with him or what i could try?

Find a ferret vet, asap.  It could be several things, but the first that comes to mind is insulinoma, which causes low blood sugar.  You can try giving him a little honey or karo (corn syrup)  If that perks him up, get him to eat some high protein food, like chicken or turkey baby food.  This is only a temporary fix, if it is insulinoma.  If you get him to a vet, have his blood glucose checked.  
What is his normal diet?  How old is he?  Insulinoma is treatable, but he will need to see a vet for meds.  And, as I said, It could be something else.
Best wishes.  

THE DOOKS OF HAZARD

I will try what you suggested and see if that helps but that's where my problem is there isn't a vet around that treats ferrets the nearest one is over 4 hours away.

See if you can get the local vet to at least test his blood glucose.  Research insulinoma in ferrets and bring some info with you.  A lot of vets will work with you if you push them and beg.  You must be in alaska, the rockies or Australia.  We'll help however we can, but we are not vets.  

THE DOOKS OF HAZARD

How old is your ferret? Is he displaying any other symptoms besides lethargy and lack of appetite? 

Has he eaten anything besides Furovite? Although it may be the only thing he wants to eat, I would caution you against giving him any. It's basically pure sugar, one might as well feed him candy.
Most ferrets take well to warmed chicken baby food or egg yolk.

Can you post a location for us (even just general area). Your baby desparately needs to go to the vet and we can try to help you find one.

Ferrets: Wesley, Percy, Owen    -rip Bandit-
Bettas- Kitty, Pip, and Logan
Sun Conure- Kita
Gerbils- Piper and Tailer

I am not sure how old he is because we bought him from someone and they didn't even know for sure, He did throw up once in the last few hours.I thought he looked a bit skinny for a while now but he seemed energetic and was eating going to the bathroom and everything fine so i figured that was normal for a ferret cause i was told that some are very skinny.I got him some chicken baby food and warmed it up but he doesn't seem interested in eating it but i read online to try and put a little on your finger and rub a little on the top of their mouth cause they will at least get a little so we did that and he did get some that way. I live in Canada but its a small island and the nearest city which is where they take ferrets is approx 4 hours away but i am going to do what unclejoe suggested and plead with my vet here to at least take a look at him.

Any vet should be able to do a BG check. They would just need to know what is normal for a ferret. Where in Canada are you? I have facebook friends in Canada.

 
Fuzzbutts Rule!

I noticed a day before he got like this he had the diarrhea a couple times but all of his poops weren't like that, so i am wondering if that would make him weak even just having it couple times. Yesterday i notice he had it too, so yesterday and today i have been giving him the chicken baby food and pedialyte and he seems to have perked up a lot today and he seems to really be more eager to eat and drink then yesterday.Yesterday he would just lay in my arms and stay there and today when we give him his food and pedialyte after he is done he is squirming to get down and he has the little hop in his step. I don't want to let him run around to much cause he needs his rest. I am going to call the vet even if they can just get his blood sugar check and to find out what may have caused his diarrhea.