I've been feeding my tigers frozen salmon for a year now. The first thing you need to do is buy a salmon fillet then cut a piece cook it and eat it, if it’s not bony then its safe (don’t cook for the salamanders). While frozen you can cut some pieces the size of an almond, run under some warm water then you’re ready to feed. You can use your fingers or plastic tweezers. This is ok 1 time a week. I have 4 tigers and 1 fillet lasts about 6 months