My boy LOVES these!  I like to give him one as a before bedtime treat when we run through a few learning exercises.  He is very focused, as he knows he will be getting one of these at the end our our lesson.  This is one of the few treats I've found that have this consistent enjoyment on his part.  The price is very good, too, as these are considerably higher at Petsmart or Petco.  Unfortunately the bacon flavored ones are $10 higher at the moment.  I'm hoping these stay the same low price!