I have a GS that is a super picky eater and I've tried everything with her. The longest she's gone without eating is 3 days. My yorkie right now is eating bill jacks. The kibbles are shaped like pellets and not hard to bite on. He loves it!(thank goodness I'm lucky with one dog eating
) have you tried putting the food out for 15 minutes then putting it away? I had to do that with my GS and after 2 weeks or so she gave in to eating when food is there and eating what I give her. She is very stubborn and went on a year of being a very picky eater. I must've tried over 7 different brands of kibbles. My trainer says "they will eventually eat and not starve themselves so keep being consistent with timing their meals"
Hope that helps and good luck!