Oh! What type of insulin is Sach on? I checked 1-800-PetMeds and Chewy and they both have insulin syringes available, but what type depends on the type of insulin Sach is on! (My kitties were on Lantus) Are you able to call your vet for confirmation on what type of syringe (U-40 or U-100) is appropriate?

https://www.1800petmeds.com/Insulin+...prod12420.html
https://www.chewy.com/s?query=insuli...submit-button=