Cod fillets should not have bones, and should break into "chunks" very easily. It has a buttery, sweet flavor so I imagine she loves it
I'd still suggest mashing it a bit with your fingers to make sure, if there is a bone it will be around one of the chunks...
I would never buy pre-frozen fish, but that is just my opinion - and it is one that tends to be quite strong
We cook a great deal of fish for ourselves, and Remy gets some as well. Rockfish (Striped Bass), Halibut, Salmon- are all fish Rem gets. I am super paranoid about bones and mash it with a fork....I never buy supermarket frozen. We have a relationship with a fishmonger and everything we get is fresh from the commercial distributor. There should never be a fishy smell...