What do you like about it? What do you dislike about it? How much do you feed.how big is your dog/how long does it last? What formula do you use? Do you mix anything with it (kibble, raw, etc.)? If you feed Preference, what do you use as your protein source? What differences do you notice in your dog when they eat THK vs kibble? Logan LOVED the sample of Keen I just gave him. I have 80 samples total they sent me (and a t-shirt!) so I'm going to see if he likes the other formulas, too. As of right now, if I switch him to THK, I plan on either using Preference or Keen (or possibly some of the other cheaper formulas), and adding either raw meat, eggs, or kibble to it to make it stretch a little farther. Right now I have a $45 bag of kibble that lasts both dogs just under a month, but I don't have to buy joint supplements or fish oil for Logan anymore (since I get them though IAADP) so that frees up some funds there. I also get a 20% discount on THK if I order through their website (nobody local carries it anymore).