Could't agree more with Mr Monks.
All carnivores do get veggies in their diet.
Felines and all Canine species are known to go for the intestines of their prey before anything else. The reasons are still a bit under debate (bacterial/enzyme content of the stomach is a strong guess for motivation), but the fact remains that they get the contents of the stomach of the (typically) phytophagous prey they get.
I have been fiddling with strict carnivores, such as snakes and even with those, the vegetable content of nutrition is an issue.
I prepare and freeze a mixture for my fish.
The ingredients are:
-shrimps, with shells
-white fish (pollock)
-mussels (no shells)
-spinach
-peas
-banana (no peels)
-beef (pork) heart
-juice from a lemon
-garlic
-eggs and their shells
-beef liver (not pictured, the only ingredient that I cook before mixing everything)
-carrots (missing from the pic)
-spirulina powder
-vitamins
-gelatine
Everything is run through a mixer.
I bag it in thin bags, cool it down to let the gelatine work and then freeze it.
This is how it looks frozen and ready to feed:
I have yet to keep a species of fish refusing this food. The shrimp-mix floats for awhile, when you toss it in the tank frozen straight from the fridge, so the surface-feeding insectivores like archers and
Pantodon seem to find it tasty and convenient. Well, mine have, anyway.
And my mudskippers seriously love this stuff!