Cat Diabetes Seizure Cat With Diabetes/seizures/organ Failure?

Cat with diabetes/seizures/organ failure? - cat diabetes seizure

My cat is only 4 years, and Thursday, began with seizures. It is also very low birth weight of 5.8 kilograms and was very dehydrated and not eating. We took her to the vet and he ran a test to see whether they had AIDS or cats and dogs lukemia negative. Also tested for diabetes and then his blood values were within limits. You do not want to eat alone, forced to eat with them and their water. She is still having seizures, and he is lethargic and weak. I'm not sure what the problem might be with him. My question is, they want us to send more tests to determine organ failure, and if so, is something she can not return, or if you have to do and have a hard life? If so, it is better to just put the cat out of its misery? When we see the vet, veterinarian technician. "We have the quality of life and all those who think, so I do a little worried. Any input would help