Fussy Schhauzer - what should I try next?!

(Mr. Rob Hawkins)

My miniature female schnauzer age 2 years is very fussy about eating. I have tried all sorts of quality food, i.e. Nutro, Science Diet etc. The neutured male will not eat if she does not. We visited the vet who gave me venison (deer), which she would not eat.
2 days passed and I resorted to boiled chicken breasts, but was told by the vet to stop. I have even tried duck. I will be abroad for 2 weeks and I am afraid she just won't eat. All tests were negative i.e. pancreas. She is only 15 lbs. Please help!