<s>[INST] My baby is 14 weeks old & has had mucus on her chest from birth. She is not getting rid of it at all. I breast fed her for 7 weeks. She is on Aptamil formula now. Every time I give her a bottle her wheezing gets worse. Do u think it s the milk that is making her worse?? I m thinking of changing to soya milk. Can u please advise. Thank u. [/INST] Baby may be over feeding with bottle or regurgitating. Try to change to nipple with smaller hole appropriate for his age. Keep him reclined with head slightly upward while feeding. Burp well after feeding and during sleep also support him in reclined position. If these measures doesn't help take help of pediatrician to rule out other anomalies like TEF & other chest infection/HAD. For HERD antigen medicine may be required. </s>