5 month old not eating?

Pebbles

My son is 5 months and as of yesterday stopped eating. He normally takes 8 oz every 4-5hours with some baby food in between. Yesterday he ate in the morning and only an ounce here or there until bed time he finally took 8 oz and even that was a struggle. Today he took 8 oz this morning and just now only 3, he absolutely will not take more and refuses baby food. He’s completely happy not bothered, no fever, thrush, peeing and pooping. I thought it could be teething but he’s not in any pain, just doesn’t want to eat.

Any one else go through this? What was the outcome?