Is this diarrhea for 10 month old baby

Hi everyone has anyone of u experience this, my LO pooped 3 times today morning his poop is normal then after I feed him milk and eat the porridge I make hot from freezer he pooped again this watery consistent now in the evening while I give him watermelon his pooped is watery again 8s this normal? He isn't fussy or anything he is normal n happy playing