Of course eggs are ok! Well I guess it really depends on where the eggs come from. If you can find a CSA (community supported agriculture) and get some organic eggs, then go for it. With CSAs you are supporting local produce, meat and dairy, which doesn't have far to travel to your table or the pet food bowl, which makes a smaller carbon footprint.
http://www.ecobusinesslinks.com/comm...griculture.htm
http://www.acornorganic.org/
http://www.equiterre.qc.ca/en/agricu...Bios/index.php
My fuzzbutts LOVE eggs. Anytime I crack an egg for cooking people food, Sheeba is right there roo roo'ing for her share. It's a riot. They both love the crunch crunch of the shells and licking the liquid parts. Sheeba hates it when I use eggs and she doesn't get any.
Eggs w/ shells in the diet makes for confetti poop though.