Talk to Pediatrics on Black Stools

AOA dear team mera beta 4 months ka hy or black stools pass kr raha hay. Is mo bith k bad se mothr feed ni mil saka tha tu formula milk pe raha hay ab 4 month ka hony k bad is ko gaye ka milk dia tha 2 weeks k bad phir dubara formula milk chala dia tha. Sath main arithmo syrup day rahy hain q k theek ni tha dr. Nay recommend kia tha