Your pet will probably require re-regulation at some point. During re-regulation periods, expect a curve to be run a week or two after each adjustment in insulin dose. This occurs after an insulin overdose. Administer 4 tablespoons of Karo syrup for a 20 lb. pet. If no improvement occurs, immediately see your veterinarian for emergency treatment.
Some pets seem to require re-regulation frequently.
There may be an underlying reason to sort out. Improper administration of insulin. If possible, have your doctor observe you giving the insulin to your pet. Your insulin may be out of date. Rapid insulin metabolism.