After a handful of reports of dogs having problems recently with variations in blood sugar, I thought I'd bring up the possibility with any insulin that improper handling during extreme weather - hot or cold - can damage the insulin.
If you're suddenly experiencing regulation problems and you have changed to a new bottle of insulin, it's always worth considering that the insulin may be damaged.
If you're suddenly experiencing regulation problems and you have changed to a new bottle of insulin, it's always worth considering that the insulin may be damaged.