3,637. Combining Doughs

Hilchos Bikkurim 7:1

Let’s say that two doughs are collectively enough to require that challah be taken, but neither one is large enough on its own. These doughs touch and get attached to one another. If they belong to two different people, challah need not be taken even if they’re made from the same type of grain. This is because we assume that the two people don’t want their doughs combined. If it’s known that they wouldn’t object to their doughs combining, then they’re considered like one dough.

Hilchos Bikkurim 7:2

Let’s say that both doughs belong to the same person. If they’re from the same type of grain, they combine and challah must be taken. If they’re of two different types, they don’t combine. The reason is because of a presumption that one person doesn’t mind his doughs combining. If he objects to the doughs combining and tries to keep the doughs from touching or mixing, then they’re not considered combined even if they’re of the same type of grain.