Hello everyone, I've been on the site since I got my pup (Scout) he's now 15 weeks old. I've been using the clicker training method and it has been working very well. He can sit, down, come, ext..but the main problem I'm having now is teaching whoa. I started off teaching "stay" which he's picked up very quickly but when I say stay he immediately sits down but now I want whoa and I'm having trouble breaking the sitting habit. I've tried more desirable treats when teaching whoa but he's just not getting it. 

Any suggestions would be greatly appreciated.

 Also looking for a some great reading material on trainging