This sounds like an issue of trademark and not copyright. Lots of poeple use incorrect words.
I'm sorry, but
"To check to see if he has a trademark visit
http://tess2.uspto.gov/bin/gate.exe...nglish&p_d=trmk If there is no trademark you have nothing to worry about. "
is completely misleading.
That site looks for *registered* *federal U.S.* trademarks. It's also possible that the trademark is registered with another governmental body, like a US state or another country. But trademarks do not have to be registered to be valid. Registration just gives you a stronger legal protection.
CrazyDogRanch.net sounds fairly specific. Depending upon your anticipated use of the domain it could very well be an infringement. It may not be. But there needs to be all sorts of facts in evidence before someone can say for sure. Taking legal advice from a bunch of random people on a website is not a good idea. If you want a full answer, consult a lawyer with experience in the laws and policies involved with domain names and give them all the facts.