What's wrong with my dog?

[Cicero]

So I have two mixed pitbulls, half sisters. One is perfectly healthy, while the other one seems to be getting skinnier and skinnier over the years. Just recently I noticed that the skinny one has barely any teeth. My mom doesn't have the money to send her to the vet. Also, about 5 years ago, she started itching herself really bad. At first we thought it was the season. Then we thought it was the food. Then we thought it was dry skin. Then we thought it was a bug in her hair. We've tried pet lotion, (they are outside dogs) we tried washing them every week. We've tried tea tree oil, we've tried switching her food. Nothing works. Our other dog is perfectly fine. They are eating the same food, and in the same exact places. But something seems to be wrong with just one. Any other suggestions we can try? We've started giving her food a little water and some enzymes to help digest the food, but to soon to tell. It seems like the food passes right through her. We cannot afford a vet.

[FreeFall]

How much tea tree oil? Was it pure, straight or diluted? Did you use 1 teaspoon of it with anything else? Or just one teaspoon?
How did you use the tea tree oil?
Is she neutered or completely in tact?
How old is she?
Do they share the same mother or is it the father?
What is mixed in with them if you know?

If you cannot afford a vet, which very sadly is something she desperately needs, take her to a shelter and see if they can help in diagnosing her.

EDIT: I do not feel comfortable in you and your mom trying to diagnose your dog without the proper attention she deserves.

But watch her stool. Have you looked at her poop and examined it at all during this time? Did it look abnormal, like if she ate rice or anything?

[Cicero]

How much tea tree oil? Was it pure, straight or diluted? Did you use 1 teaspoon of it with anything else? Or just one teaspoon?
How did you use the tea tree oil? A few drops with about 5 tblsp of water
Is she neutered or completely in tact? Not neutered
How old is she? 7 yr old
Do they share the same mother or is it the father? Same mother
What is mixed in with them if you know? Shepard, Pitt, chow chow

If you cannot afford a vet, which very sadly is something she desperately needs, take her to a shelter and see if they can help in diagnosing her.

EDIT: I do not feel comfortable in you and your mom trying to diagnose your dog without the proper attention she deserves.

But watch her stool. Have you looked at her poop and examined it at all during this time? Did it look abnormal, like if she ate rice or anything?

I've mentioned putting her down, but then we know that her sister would be majorly depressed because whenever they are split apart, they just bark and howl and start whimpering. No one would adopt a dog like the sick one because she is in terrible condition, and they aren't to friendly with most people. And I have no idea of how we can watch her poop, were gone half the day so we couldn't tell which one pooped. How much would it cost to have her checked out, do you think?

[FreeFall]

To check her stool, isolate her somehow. Make a fence or a pen or something to separate her from the other dog. That way the stool won't be mixed up.
I was wondering if she has some tooth pain/decay/disease that makes eating painful. Or if she had gotten tape-wrom if her itchiness was from fleas. Definitely seek help from those who deal with animals first hand. Chow chow are a breed known to be prone to diabetes, but I don't think the chow in her would be enough to really worry about that.

The cost varies place to place so sadly I couldn't tell you off of the top of my head. I know I hear some places will do it for free, then make you pay for treatment, some will make you pay a little fee and others will ask you pay before they even see the dog. If possible just go place to place when you have the chance and see where you can help her as needed. If the enzymes don't seem to be working like after a week of giving them to her, it would probably be best to start a doggy vet jar for you guys to drop money in to take her to the vet if no one is able to help you guys, after you do your run arounds.

I hope your dog recovers soon and you guys get your happy healthy dog back (:

[ackmedsgirl666]

the first thing to check as freefall said is their poop
i know its gross but poop can tell you alot abour your animal
even if a vet is unaffordable if her poop looks different/smells differently then the other dogs she might have some sort of infection and do to her aging her immune system is weakened and she cant fight whatever it is... however it doesnt hurt to see a vet just incase