like symptoms in this age group is usually due to viral infection. Decreased appetite with some irritability is common in most of the illness.
The blackish material in stool may be undigested or poorly digested food material.
Most of the viral infection needs only conservative management and subsides on its own.
I would suggest you to try to continue feeding your child. Diet should consist of low lactose content material (avoid dairy products) and it should be easily digestible and cereal based.
Give plenty of fluids including ORS
. Watch for frequency of urination. 4-5 times per day indicates adequate hydration.
Give him Zinc syrup and some probiotics( lactobacillus
).Also get a stool routine examination done, to find any abnormality.
Diarrhea usually subsides within 5-6 days, but if baby becomes lethargic, oral acceptance is poor, has less urinary frequency consult your doctor immediately.