If I'm not mistaken, subdomains ARE actually subfolders in your site structure. training.dogs.com can also be found as dogs.com/training (but not necessarily the other way around). Now if I was a techie I would know exactly where the subdomain setup is done - in the DNS info?

I imagine it wouldn't be difficult to convert a subdomain site to a subfolder site, apart from the inbound linking. But if you control all of that .... hmmm

Isobel