I would assume that the Ocean Whitefish and Tuna by Friskies would be the same in both the US and Canada, I'm in the US but I feed it to my diabetic, and he is doing great on it (7 months and counting in remission).
Pepper's Mom: Well not just anything, but yes, within reason as long as it is under 10% carbs for a diabetic you should be fairly safe. but you want to try to feed fish no more than once a week, because it is high in heavy metals and phos. so just like with people it isn't a great choice to give to often. Other things to watch is that some, not all cats have allegic reactions to beef or gluten or grain. I have one here that is a little odd fellow who happens to dearly love tuna but is deathly allergic to it. And personally with my diabetic Maxwell I like to keep him between 4-8% carbs. But every cat is different so you might have to experiment a little with different food choices to find what works best for your cat.
Mel, Maxwell and The Fur Gang