How to keep the bread in a long hike ?

hike lasts two weeks, settlements along the way there .

The bread is bad for the intestines ?

delete items of gluten .I do not understand why people buy healthy foods without gluten .He digested healthy, but the meal is different .Rye, wheat and many other species.whether all the bread is harmful or not?Just I heard that dogs the bread as it is harmful for birds and for humans ?Man Well also do not iron .

What breadbaskets does not get stale bread for longer ?

Tell

bread in a breadbox stored without package ?and that he does not get stale ?