How long does a dog’s low blood sugar generally take to recover?

Recovery time from dog hypoglycemia depends on the cause. If from prolonged hunger, glucose injection or supplementation usually restores it in about ten minutes.

If from long-term malnutrition, it needs a longer adjustment. Signs are weakness, trembling, limb weakness, sweating and dizziness; give glucose when seen, and for severe cases seek a vet check after energy support.