Yoshi was in remission for 5 months, but since 3 weeks his BS is in 250 range. I have started Lantus again with 1 unit and after seeing a vet increased to 1.5 twice per day. I feed him Frieskies Turkey and giblets(as recommended by a vet). His numbers are not changing and I am so worried. Do you think that the insulin has expired. How long I can use a vial? What would you advise me to do?Thank you in advance.