well they really don't chew, they do what is called bolt their food. toss it to the back of the mouth and swallow. espcially if the kibble is small, and that's ok. I'm feeding Fromm Pork and applesauce also Fromm Senior. for the tearstain, try this, take just a dab of vasaline on your finger tip, then wipe off the vasaline with a tissue. after that, put a dab of Desetin on your finger tip and gently rub that into the tear stain, keep out of the eye. Also try bottled water.