I don't think that you guys are thinking about this the right way. Just because an animal can not build a house or a city doesn't mean that they are not as intelligent or even potentially more intelligent than humans are.
You have to think, what is that animals purpose here on earth? Maybe they just know that building is counter productive in the larger scheme of things?
I saw a video about some tourist spot, and the monkeys that were in the area learned how to steal tourist belongings and then ransom the item back to them for food. That is some fairly high level thinking on their part!
I've almost always had a dog or two. There have been times that I, suspected that they could understand every word that I spoke to them. Maybe they do know our language but just can not speak it? Or, maybe their systems are so finely tuned to be able to sense the energy that is associated with having someone speak? Most people do not have such skills. but either way I think it can be construed as intelligence of a sort.
Cats are...a little spooky at times. I think I have picked up on cats trying to control or manipulate people at times. I have even watched some sort of testimonial on youtube where the speaker was giving an account of a visitation from Jesus one time, and she made the remark that Jesus was kidding (?) with her and told her, that her cat contemplates God better than she does!
...and, why wouldn't or couldn't that be true? Scripture says that, all of creation sings praises unto God...so it makes one wonder, just how "intelligent" animals really are? It could very well be, that animals station in life just does not require the activities of building, architecture and all that stuff. Judging from society and man's effects on the earth from such activities we can safely say that, mankind are idiots and slow learners. Scripture hints at this too. The wise become as fools and the fools as wise.