Poop picture... should i be concerned.

First off sorry for sharing a poop picture. My LO started pooping like this since yesterday. It's his 3rd poop like this in a row, with his 3rd being tonight (he never poops at night). He is formula fed so his poop is usually more solid or like pebbles. Should I be concerned? Upfate: its 3.q9 he just pooped again...similar consistency just a lil bit less