What in Wellness causes this? I have read NUMEROUS post with people stating this over and over. I know their formula changed a while back but what exactly do they have that causes this? My friend got sold on a bag of Wellness Puppy Mix because the introductory offer was $3.99 and has a coupon inside for $4.00.... well now they too are having problems.... I told them to give some canned pumpkin or plain yogurt but not sure how much they should give. They have a 4lb 5 month old puppy. Thanks!