Some animals are asymptomatic at very low bg values.
This means they do not show any of the usual signs of hypoglycemia even though their bg is very low. This can make diabetes management more difficult because you are not always aware of when your pet's blood glucose is too low and when less insulin should be given. One Saturday afternoon, our cat Barney was sleeping on a chair. He looked like he was taking his usual afternoon nap. Like a lot of other owners of diabetic pets, I often made sure I could wake Barney up from a nap - just to be sure he was sleeping, and not in a hypoglycemic crisis.