Very nice of you to adopt!

I used to feed my dog with nutriedge, chicken then moved to salmon and rice. My dog get bored with it very fast, maybe not that fragrant. They will still eat if i sit there supervise, but takes long time. Sometimes, adding some water to the kibbles help, not flooding it. I've tried Taste of the Wild/Blackwood/Meradog/Solid gold/Profine also, but expensive kibble doesn't always pose better outcome.

Now i've changed to lower quality food, Maximus, due to budget issue also, but i give fish oil and sometimes carrot/cucumber to my dog. My dog poop ok and not yet bored with it. I used to be obsessed with reading kibbles review online, trust me, the more you read, the more your head spins. Just get some idea reading kibble beg ingredient and try it.

Nutriedge chicken i get 15kg for Rm180
Salmon & rice 15kg i think he quoted me Rm210
Maximus chicken 23kg RM140

Good luck trying out all the brands that fits you budget, too many brands out there. Do note switching too frequent will upset their digestion system, do it gradually always. As i recall, nutriedge is not grain-free, just hollistics. There's a lot of discussion whether grain-free is the answer for quality food (my dog can't take grain-free, diarrhea, haha). Well, it's always better to judge by looking at your own dog, their fur, /poop/growth and etc.