Hi, I'm trying to figure out if one of my cats is sick, seriously sick, or
just being the very definition of moody lately.

first of all, I have 2 cats.  1 female short hair who has always been kind
of tiny, not usually more than 7lbs, probably sitting around 5 right now
spayed when she was only about 6mo old.
1 male med hair, part pixiebob who's been neutered.

It's the little girl, Jackie, who isn't acting right.  Tas, the male, is ok.
They're both about 3, and we've had them both since they were 3mo old,
although Jackie is 3mo tas's elder.  

She's lethargic, spending a lot of time sleeping, when normally you wouldn't
know her from a 6wk old if she weren't too big.  She's gotten notably more
vocal when she is awake, and whenever Tas gets near her she starts hissing
and growling and huddles in a little ball in a corner after bolting.  After
this she is very irritable and will even hiss or growl at me if I get
close.  

While Tas does tend to have a pixiebob's bulk (not helped a gread deal by
being snipped) Jackie is 5lbs pure muscle, while she's currently acting
like she's afraid of him this doesn't make sense because I've seen her
throw him half way across the room while they were wrestling.  She doesn't
seem to be eating as much as usual.  And she often has a wet nose and chin
as if she's got a runny nose or perhaps has been drooling.  The only other
thing that's unusual is that she's started having terrible bad breath the
last couple of months and normally the one prone to any kind of stench is
Tas who doesn't seem to understand bathing.  I've found a site that makes
it seem as though she could have infected gums.  

Please, the Vets around here make more money than the people Docs in many
cases so taking her and finding out that it's only a cold or allergies
would be *HIGHLY* impractical.  I miss seeing my kitties cuddle eachother,
and I miss them playing.  If anyone has any idea what could be happening,
and what could be done I'd appreciate it.

PS if you happen to be in the Augusta, GA area and know where a good,
resonably priced vet is I'd appreciate that input as well...  I got spoiled
in AR where we had a vet where a THOROUGH set of shots was $30 with like
virtually no office visit fee, and the best I've found as yet was $140/cat
for the annual shots.