Oh I am so sorry that Tatum is having a harder time.I really hope she starts feeling better soon. I really had a rough time getting Maddie to eat kibble she was on ceaser puppy when i brought her home and the switch has been rough. Our solution was to Cook sweet potato and boil chicken and then put some in a food processor along with a little parmesean cheese and kibble (put the kibble in first so that it gets crunched up). This way is was all mixed together, no picking out the good stuff
Slowly I would use more kibble less of the other. I used just a little chicken stock (without the fat) to make it mix right. Now maddie eats kibble just fine.