[dotuser]

Interesting, for me (and your dog's mileage may vary), humulin and novolin are interchangeable. I bought humulin at walmart before they switched to novolin but I rarely use NPH. I only need it when either I don't have insurance or I need a new prescription because my insurance decided to switch to another preferred basal insulin. It's easy for me to see any changes since I can monitor my blood sugars but for a dog, that could be a challenge and probably requires a stay at the vet to run tests.