Reddit mentions of Zuke's Mini Naturals Healthy Moist Dog Treats Variety Pack - 6 Flavors (Roasted Pork, Wild Rabbit, Roasted Chicken, Delicious Duck, Savory Salmon, & Fresh Peanut Butter) - 6 oz Each (6 Total Pouches) (6 flavors)

This is GREAT and keeps him busy for a bit:
https://www.amazon.com/gp/product/B003YHB8EI/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

These are great for training:
https://www.amazon.com/gp/product/B00TGIFUYI/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

I feed mine 1 cup x2 per day of this food. There are pretty clear directions on how much to feed based on weight / goal weight. Mine is on the bigger side but still in excellent shape at 50lbs.
https://www.amazon.com/gp/product/B0089A66N8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

One of my shibes is super picky too! Jerky type is her favorite but meat-based treats are her preference for sure; I've found anything with salmon she usually loves. She does not like peanut butter or anything "cheese" flavored. We get Barkbox and I usually reorder what she really likes so I know I always have some on hand. I usually break up bigger jerky-style ones to make them last longer since they're more on the expensive side. I'll link some of her faves below:

• True Chews - steak jerky, duck jerky
  
• Trader Joe's salmon strips ($3.99 here in FL I believe)
  
• Zuke's Training Treats - 6 flavors (I got this when I realized how picky she was, she liked 4/6 flavors)
  
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  She also loves string cheese. It's her #1 favorite thing in the world I think :) I sometimes get the cheap sliced meat and use that for treats on occasion if she needs to be persuaded into something or distracted! I hope this helps!!!