Today I got my 45 days child bun test along with pottasium serum , creatinine and sodium on doctor advise. Bun serum is 25 Creatinine serum is 0.55 Sodium serum is 131.56 Pottasium serum is 5.29 Child was on cow milk feed from the past one month due to mother's surgery after c section She went through laprotomy due to abdominal pus collection Mother feed is now 2 times a day Child is completely normal and active Doctor suggested formula milk and have started also Kindly suggest is it a very serious condition to worry about.