Please ignore mbireland, in a test for diabetes it would be a ketone test, that your Dr can do with a sample of urine with an instant result. Increased thirst (not necessarily from pint glasses), loss of appetite = weight loss, lethargy, increased need to go to the loo/possibly 'accidents' in the night.. Similar symptoms in children and adults. Diabetes in such a young child is nothing to be flippant about, you have to cross many bridges, but your sister may not even be diabetic! What is your situation, as I am experienced in childhood diabetes x