You need to stretch a hide before oiling and during the oiling process - this is so the pelt absorbs the oil whilst it is drying.
Working the pelt by stretching ensures that the fibres don't shrink and become hard woven.
Breaking (only for Flat Skin/s)
Breaking can only be started when the hide is 90 - 95% dry. The leather will naturally dry out while you are working with it. You’ll know it’s getting dry, because it will start to crack. It is the end of the tanning process. Breaking can be done until the tanner is happy with the result. The more work put into the breaking process the softer the result. We recommend that breaking be done width and then by length as this will achieve a natural line. A successful skin is quite soft and pliable when completely dry.
TIP: The perfect dried pelt will look blueish or silver in colour. If the pelt is white, then it's too wet and if the pelt looks brownish in colour then it's too dry.