Dog Problem - Jack Russle -Refusing to Eat

HI Everone New here, Scooting around the Ol Internet trying to find a Solution to my Problem.

My Dog is a 15 year old jack russle, she all of a sudden has refused to eat ANY food, weve had her to the vet theve done numerous checks on her and have found nothing wrong with her she was thowing up green Bile at first but thats stoped after they put her onto Anti Biotics, Were Having Real Problem getting her to eat now she looks at the food and walks away as if its makeing her feel sick.

Any Ideas Sugestions?
Cheers

the vets have so far tried.
blood test to rule out the first sugested problem of kidney failure this has found out that the dog is in Verry good Heath for its age acording to the test
have had numerous physical Examination only thing they said was the dog didnt seem to like having her figners shoved up its rib cage *altho i imagine i wouldnt neither*
weve had her in 1 night on a drip as they said this will boost her str and hopefuly get her eating agian
and we are currently on a Course of Anti Biotics.

 

Have they checked her mouth? Sometimes a sore mouth or a bad tooth with cause a dog to stop eating. Good luck.

 

the mouth is a little messy no more than expected for her age, that is a posibilty we are takeiner her again to the vet tomorow hope we will get some info from them as its getting close to the point of letting go. :cry:

 

just an update had to put her down :cry:

 

:cry: I'm sorry

 

so am i , it just got to the point where she couldnt go on any more at least i know she died with her dignety intact, quick and painless.