Stan has been on natures variety now for about two months and about a full month with no kibble mixed. I find it is causing constipation big time. I am going to start preparing my own i found a butcher in our area that has ground bison for like $2 a pound if i buy 30 pounds. anyway i know the bone may be the culprit of the constipation so what i have been doing is using less natures variety and just adding my own meat. it has helped a little but his poop is these balls which i know it is supposed to be but they are huge and he is having trouble passing them they are just formed to big. my question is could i use cottage cheese for calcium for now until im comfortable and i can slowly add in bone to his food to see what amount causes this constipation? he loves cottage cheese but hates pumpkin so i can not add that or he will walk away.