Hahaha... Navlav8r... absolutely right.
To the op... stomach and intestine contents contaminate meat if it is too bad or you leave the animal a long time before gralloching it, high temeratures accelerate and worsen the process.
Best thing is to clean it the best you can, maybe trim some, and if water is available rinse it some.
Rubbing in some acidic solution like lemmon juice or vinegar or even some dry schnaps stops the prolferation of the bacteia that produce the stink and the gamey taste.
