Rozie: I know that I have seen free range eggs in my grocery store. You probably have them too if you just look. As far as the others one. I don't know, but I'm sure they wouldn't be too hard to find.
Ali: They have the bone figure ones for dogs of all sizes, and then they have like shredded greenies for small animals. People normally sprinkle some on top of their food.
I have the small sized greenie bones. I've offered it to my cats, they sniff, take a lick, and then decide that it's a toy.
The dogs I have used them on, for the ones that ate it, it DID work, improved teeth and breath. Plus they are all natural.http://www.greenies.com
Binkihoo: Regaurding the feeding of RAW/BARF materials, you should do some reading on it and you'll understand how it is fed. Cats eat raw food, they can eat it in our homes, or they can eat it out in the wild, they are much more resistant to the enzymes in things like raw meat, either from the beef at a bucher shop, or from a fresh kill. However most people who do feed RAW or BARF (this includes chicken necks.) Regularly deworm their animals.
There are a lot of great websites out there. Just do a search for RAW Cat Diet.