Really now people. I am a proud owner of 3 cats (none of which I would ever tattoo), but you really can not say this is horrible or disgusting. Yes, I believe this is not horrible because of reasons like ear clipping and tail docking being much worse, but for many other reasons as well. Also, before a few smart people start to comment on my tail docking comment by saying things like "Tail docking serves a purpose!", I would like to say that you should wikipedia clipping and docking so that you will see that it really is only to increase speed and prevent injuries while ratting, fighting, or baiting. If you are ratting or fighting with your dog, then you are more inhumane than the tattoo artist and cat owner above. If you are hunting with your dog (and living in the 21st century, which I hope you are) then you are doing this for sport, not for your livelihood. So you just clipped and docked your dog so you can enjoy a sport? Would that person be any better? Also, if you put a collar on your cat that he does not like, didn't you just force your cat to have something he does not feel looks good on him? The last thing I would like to add is that I do not believe it would cause very much pain. My reasoning behind this is that all three cats I own were all taken in from the streets because I would find them in bad situations, such as been injured by a car, scratched near to death from animal fights, etc... and have had very serious wounds that were sometimes to the bone. All three of my cats are completely healed and showed hardly any pain (sometimes even laying on their wounds) while recovering. Anyways, my point is not that we should do this to our cats because they can tolerate pain, but that this really is not THAT bad when you really think about it and consider other factors.