Make mine split hoof and chews the cud, or fish with scales and fins, or birds that eat seeds.
I wonder about chicken though...
I will occasionally go with that which is with the cloven hoof but does not chew the cud (but as I said above, never the liver, you never see pork liver), but no blood because the blood contains the life.
Not sure about chickens either. They do eat the seed, but I believe they also eat the worm. So I dunno.