Upper respiratory infection. Conditions.

My maid 2 month son has upper respiratory infection from birth he is bottle fed from birth he got pneumonia when 15 days old and hospitalised for 7days. now he is 2.5months but his infection never gone away they have milk business everyone dealing a lot with cows and buffaloes so maybe due to that smell or unhygienic conditions or what... Pediatric gave him wikodryl drops for 7 days but no effect.we r afraid we r managing aptamil milk for him but due to cows at home they r insisting on cows milk. Some people say it will go with season. But I m afraid little boy has weak immune system and these consistent infections.will he survive in such conditions.. She had got son after so many years what else we can do for him .he breath fast during and after feeds and like mucus making sounds cough when lying.. Sometimes bluish hands and feet I dnt think pediatric will give excess medicine for him or hospitaling him again will be good..he is taking feeds on proper time