Too much fish?

[Etown_Chick]

I'd read in a thread that too much fish isn't good for kitties. What about dogs? His highness LOVES fish more than anything else on the planet. I've been feeding him Orijen 6 fish (he gets raw beef'n'veg twice a week), raw bones, sardines once a week, tripe once a week and for snax I give him dried salmon.
He's had to adapt to a chicken-free life for allergy reasons. Now I'm wondering if he's getting too much fish. I just picked up a sample pack of Acana grasslands. If he likes that maybe I'll alternate that once in a while for a change.
Does anyone know if there is such a thing as too much fish?
BTW I don't feed him raw fish as he pukes it up.
Thanks all.