Humans cannot perceive a lot of things. However, given the right conditions (post-apocalyptic world?), it would not take a lot of time before humans become perceptive again. A lot many will be wiped out, but as a species we will find a way.

I have a couple of dogs and I know what you mean. With the level of intelligence we possess, we should have achieved more. Technological achievements mean nothing when 70+% human population of the world struggles to survive. I think we use too much of our left brain and too little of the right. A balance is what is needed. Understanding this needs intelligence.