Ruling 1561 — Fasting (Ṣawm)

Chewing food for feeding a child or a bird, and tasting food [for example, to check that the right amount of salt has been used] and suchlike – which usually does not cause the food to reach the throat – does not invalidate a fast even if the food happens to reach the throat accidentally. However, if one knows from the outset that such food will reach the throat yet intentionally does it, his fast becomes invalid and he must keep a qaḍāʾ fast for it and kaffārah is also obligatory for him.