insatiable appetite/diarrhea

Hi there, I'm looking for some ideas on the correct rememdy for my kitten. I am not new to homeopathy, have been treating my horses and one cat for the last 4 or 5 years.

I have a kitten, probably about 6 months old. She has been spayed and had a rabies vaccination (unfortunately the only way she could be fixed) in october. She has had diarrhea since I got her and can not get it under control. She has an insatiable appetite, and eats EVERYTHING (only edible items though). She is ravenous, like a vulture. Steals the food right out of the other cats mouths.

She can be neurotic at times as well, a little more than just kitty behavior. Drives the other cats nuts, always wants attention, playing or petting. A little dull to reprimand and the spray bottle.....lol we always sing 'and the cat came back....' as she just doesn't GIVE UP!

Her diarrhea is constant, light brown in color, sometimes with blood, and LOTS of gas! Horrid odor as well. Always uses the litterbox (which was a fiasco to teach her) immediately after eating.

She is on a canned food diet, was extremely thin when I got her, but now is of good weight, growing fine, and has ummm, LOTS of energy! The food comes in plastic containers, and she had the diarrhea when I got her when her diet was dry food and occasionally still nursing. I've also tried a few different kinds of food, including some from the vet, and the diarrhea never changes. She eats EVERYTHING, not just her own food. If your not careful she'll steal your bread right off your plate sitting infront of you (literally).

There's something else going on, I've never seen a cat so ferrocious about food. She tested negative for worms also.

I was leaning toward lycopodium for the gas, insatiable appetite, and diarrhea.
any suggestions would be great...
Lindsay