بسم الله الرحمن الرحيم
(Fatwa: 169/125/L=02/1435)
You should keep on reciting Surah al-Falaq and Surah al-Naas thrice every morning and evening and blow on your daughter. She will start accepting the milk, in-shaAllah.
You may recite the following dua thrice and blow:
وَإِنْ يَكَادُ الَّذِينَ كَفَرُوا لَيُزْلِقُونَكَ بِأَبْصَارِهِمْ لَمَّا سَمِعُوا الذِّكْرَ وَيَقُولُونَ إِنَّهُ لَمَجْنُونٌ
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
