The rules of Radaa' still apply if the child drinks the breast-milk from a bottle

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Their father’s wife breastfed a baby girl – is she regarded as their sister?
The children of your father through breastfeeding from his second wife who did not breastfeed you are siblings to you

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Related Answers:
It is permissible for a woman to breastfeed her child before doing ghusl
If he was breastfed by a woman, does her son become a mahram to his daughter?
Rate of maintenance for children if they are in their mother’s custody
Their father’s wife breastfed a baby girl – is she regarded as their sister?
The children of your father through breastfeeding from his second wife who did not breastfeed you are siblings to you

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