We have a 11 year old Siberian Husky.He was diagnosed with type 1 diabetes 5 weeks ago.We have been checking his blood levels as well as doing a curve .His readings are 27 to 31 and after the first curve his insulin was increased to 17,5 iu and the blood levels have not decreased after 10 days on new dose.How long does it normally take to decrease the blood levels to a acceptable level and what is considered normal Thanks.