i leave the bones in and my dogs will eat fish if kept frozen.
so they get fish-cicles...
i do not feed trout, as i live in the pacific northwest, nor do i feed raw salmon to them.
farmed trout and farmed salmon or steelhead are useless as far as nutrients are concerned...
if you can get your hands on sardines, herring, mackerel or anchovies or smelts....you're golden for omega 3.