Ian Dunbar goes into using food treats and why they are NOT to be given all the time and slowly given less and less :). You can read more in the training guide section of www.dogstardaily.com and also download his free e-book copy of his well known training book, After You Get Your Puppy, which also goes into all of this in detail. :) Lots of good advice above too! As Kate says, you are doing a quid pro quo that motivates your dog -- much faster learning than just with praise. Never punishment or leash jerks, of course!