"I have a big dog."
Translation:Yo tengo un perro grande.
Am I the only one that went with "una perra grande" just to see if they'd accept it? (They did)
tengo un gran perro was marked wrong... Shouldn't that be correct? I reported it...
Good answer. That is an important thing to understand. An adjective following a noun does not the same meaning as a version of the adjective ahead of a noun. The adjective ahead is more powerful and not your usual thing. It is more special.