Equine Intelligence, Attention Span, Memory

Here are several articles from thehorse.com about the horse's brain, learning ability, intelligence, memory, attention span, etc.:

http://www.thehorse.com/ViewArticle.aspx?ID=6494

http://www.thehorse.com/viewarticle.aspx?id=7011

http://www.thehorse.com/viewarticle.aspx?id=9479

http://www.thehorse.com/viewarticle.aspx?id=13642

http://www.thehorse.com/viewarticle.aspx?id=6346

http://www.thehorse.com/ViewArticle.aspx?ID=10050

The articles are free to read, just login (or register if you haven't done so already).