We should discern two things: In Yenika [nursing], the infant cannot suck without the consent of the one who nurses. In other words, the one who nurses must agree to carry it out. This is unlike eating, where the food is already prepared but he must obtain them. Conversely, with nursing, the lower one elicits its nourishments.
If the upper must assist the lower one to suckle, this is regarded as a deficiency in the lower one. Although the lower one must elicit its food, he certainly needs the consent of the upper one. Otherwise, against his will, this is not the case concerning Yenika.
But with food that has already been prepared, it is possible for the infant to receive them without the awareness of the giver, or even the consent of the giver. This is unlike nursing, where it is impossible to suck without the awareness of the giver. Rather, all his nursing is together with the giver. When his food is without the giver with it, it is no longer regarded as food.
In Yenika, we should discern the following:
1) The abundance always comes together with the giver. If the giver is not standing at the time of the reception of the abundance, this is not regarded as Yenika, for a child cannot nurse without the mother. But as for the rest of the foods, it is possible to receive them even when the owner of the food stands next to the food.
2) Although the nourishments are in the mother’s milk, the eliciting comes together with the reception of the abundance. This means that if the milk comes out of the mother without the baby receiving the milk, this is no longer regarded as nursing. Rather, it is specifically when the milk is revealed outward, together with the sucking of the infant.
3) The abundance does not pour out in a stream, but drips, meaning with breaks, so each time the baby wants to suck, it must draw out once more, since the milk does not pour out from the mother in a stream but in drops. In other words, the milk is drawn out when there is a desire on the part of the infant, but the milk soon stops and the newborn must start over every time.