Subject: Under what artificial conditions can an animal improve on its intelligence?

I know that it is the conditions that has provoked higher intelligence in many 
organisms. It is very much a factor in the race of the survival of the 
fittest. My question is, can we improve the intelligence of less intelligent 
animals by providing them challenging scenarios artificially. In case of maybe 
underwater or aerial animals. If possible what are those conditions? An 
interesting documentary on intelligence prompts me to ask the question.

Re: Under what artificial conditions can an animal improve on its intelligence?