My dog has a nose tumour .he is a happy chap until he eats then he starts with a griping tummy pain.and he can't get comfy. He has been xrayed but the only thing that was present was the huge amount of gas in his tummy.
Ironically his tumour does not give him any pain its his eating that causes it. It does not matter what he eats, all food has the same effect on him.
I have tried him on buscopan (vet advised ) a liquid suspension (vet supplied , charcoal biscuits, yarrow drops , a special mix put together by a holistic dog vet . I just want to help my little man but seem to be failing him, can anybody offer any suggestions.
Many thanks from Jasper

Have you tried a second Veterinarian or a specialist?

Unfortunately, I have no better suggestion than a second opinion or GI specialist, if everything he eats is giving him stomach cramps and pain, then someone has to get to the bottom of the problem.
It no doubt will require more diagnostics, and it probably won't be cheap, but well worth it in the end.
How old is he and has he been tried on hypo-allergenic diets?