
To the OP
I take it the Pedigree puppy food is the wet variety - in pouches?
I'm confused as to who owns this dog as you say initially it's your friend's but you seem to be personally responsible / involved in feeding it

...
Anyway, IMO Natures Menu, Natures Harvest & Nature Diet are all better moist completes than the one being used. All are readily available at PAH and vary just a little in price.
If intending to switch to a dry complete it would be best to do your own research as quality, availability and price points vary considerably. I like my dogs to enjoy their food and look forward to it appearing - if they are disinterested and picky with it then as far as I'm concerned they deserve better :) That said in general terms a "good food" is one that suits YOUR dog, likewise a "poor food" is one that doesn't suit YOUR dog :) It suits your dog if (a) your dog enjoys it and (b) your dog is healthy on it, i.e. good coat, good body condition, clean eyes/ears/supple skin, firm bowel motions, no itching/flaking/weeping skin etc
For ideas on where to start with researching suitable dry diets, try
Arden Grange ;
Burns ;
JWB ;
Wafcol ;
Zooplus the latter being an internet order site with Orijen & Timberwolf among others, both well rated.
I find a part raw and part moist complete diet to be the best for optimum condition but that's what works for me and mine and wont necessarily suit your dog, lifestyle or pocket :)
In the meantime stick with the bland, home prepared foods recommended by your vet until your youngster's tummy issues are totally resolved. Whichever diet or combination you opt for introduce VERY gradually to avoid further upset.
HTH, Teri