I'm sorry but really shocked to hear you will do this to a puppy.

You should never fast a puppy unless specific instructions have been supplied by a vet for illness, not because the dog won't eat.

please read my post agian , i did check with a vet.we,me and the vet,tried this to see if there was any trouble, it worked..as far as the fussy.my guys eat alot of bones and raw hides...fasting cleans them out,in my case.only stong and healthy dog would get this pracits form me....i would never put a dog in jeperty, i drive my vet nuts with phone calls..its free..respectfully

If she starts to refuse the dry kinnle with wet added, try soaking the kibble until soft, mash it up and add wet food to it, mixing well. its rare unless they are not well that they would refuse this mix.

We always soak kibble, pups or adults, soaking makes it easier to digest and will bring out the aroma better for the dog.

mine will eat better and ,more ,if its warmed up a tad..place the bowl in the middle of the floor as apossed to ,agianst the wall,a quiet place,outside,stuff like that..bacon grease,just a tad for smell.

OK, didnt realise, apologies

try adding a bit of gravy, worked a treat for me when changing to a dry food..

No animal or being can survive on processed food every day, for the rest of it's life. Commercial pet food, if you do some research was designed in the depression. Today, it has got way out of hand and there are manufacturers out there who love your money! They do not care about the welling of our pets.

I know I wouldn't like to eat processed food every day for the rest of my life... Wouldn't last long.
Dogs stomachs are designed for raw meat, organs, some vegetables and bones. They thrive on this stuff.
Please get some help from a trusted source. There are holistic vets out there to help. I wish I could help more but I'm not allowed to share my group.
I hope you find help for your best friend because they earn it