Catalyst - 11:08 pm on Dec 28, 2011 (gmt 0)
Sorry I have not done it for so long that I'm not sure about the terminology. Oh and if I remember right there are different ways to do it, so this may complicate things.
I'm talking about when the domain is still with the registrar and you just forward the URL to a page on your other site. So if someone goes to dogs.tld they land at petproducts.tld/dogs but it looks like they are at dogs.tld.