Blink dogs have "quickened Dimension Door (self only)" as an at-will spell-like ability. I am having some trouble determining exactly what the "self only" restriction entails in this case. It clearly intends to forbid the blink dog bringing along other creatures. It looks to me like, by RAW, it would also forbid them bringing along inanimate items, but this is somewhat less clear.
Can a blink dog carry a non-creature object with them when using Dimension Door? RAW answers are preferred, but any references providing insight into the RAI would also be useful.