This article is from the Mastiffs Breed FAQ, by mmcbee@access.mountain.net (Mike McBee) with numerous contributions by others.
Yep. Especially on a diet of beer, hard-boiled eggs and
beans. Actually, like humans, it depends on how the Mastiff
reacts to the food it eats, so using a good dog food should
minimize the problem. If a dog can digest its food properly,
it shouldn't have gas. Different dogs do best on different
foods. See Question 20. 'What does a Mastiff eat?' for more
information.
If a Mastiff should get gas in spite of your best efforts,
watch out. It is overpowering.
 
Continue to: