These dogs are amazing. They can smell when your blood sugar gets to high or too low. They usually have a different signal for each one. One saved a child recently. It woke the family up in the middle of the night when the child's sugar dropped really low.
Fed wolves scraps then formed a codependent relationship where centuries of genetic modification through selection and cross breeding produced the modern canine.
It isn't telling the kid about hunger. It is telling the kid that blood glucose levels are high or low. It also has nothing to do with food allergies, as you seem to be applying.
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