I like to include fish in my raw food meals for my 11 yr old Siberian Husky and 14 mth old GSD, but I don't know how often I should give them a fish meal. Also I purchased frozen, raw sardines and was surprised at how large they were. I was expecting the small ones like you find in the tins, but these things are anywhere from 5 - 8 oz each and at least 6 - 8 inches in length (remind me more of a small trout). Do I need to cut them into chunks or do I just say "here you go" and give them the whole thing? Shoul I thaw them first or leave them frozen? Only been feeding raw for a couple of weeks so still have a lot to learn!