This company advertises themselves as a LLC. A quick nationwide corporate filing search returns no registration, in any state... now this wasn't a 100% conclusive test, however, I would be highly suspect and require full disclosure from them before sending anything more than the value of a postage stamp!
community-2.webtv.net/markthom/ is their "Main" website which is free webspace provided to subscribers of webtv. In addition to theatre opportunities and pet stores, they also have a fascination with nearly naked midwestern men.
On the lighter side, the picture of the vet shining a flashlight right through the dogs mouth and it spotlighting out it's anus made for a perfectly humorous close to my day! Have a successful weekend!