I've found most store-bought treats are like junk food - okay in moderation, but you can do better. I usually use meatballs (precooked in the freezer section of the grocery) or some cooked chicken. Make some for dinner, save some for the pups. I've also been known to use waffles.
Here's something easy for chicken:
Slice chicken breast into thin slices
place on a cookie cooling sheet (good idea to use a nonstick spray)
put in a 200-250 F oven for 4 hours or so, turning over 1/2 way through (the thicker the slice, the longer it takes)
mmmmm yummy chicken jerky. I often season with garlic and/or cinnamon - whatever sounds good that day
this is healthy and stays good for a long, long time. I do store it in the refrigerator, but i don't know if you really have to.
Hotdogs - slice long ways into quarters then slice thinly. put in the microwave with cheerio's or kibble. dogs love it and the kibble/cheerio's absorb some of the hotdog juice.