Leap 2 baby eating less?

We’re on what I think is day 11 of Leap 2 and my little one isn’t interested in eating today. He’s formula fed and usually eats 30oz a day. So far he’s 7oz behind what he would normally have eaten by this point in the day. He eats every 3 hours during the day and it’s time to eat but he’s flat out refusing his bottle. He is 13 lbs and this is the first day that he hasn’t eaten a lot so I’m not too concerned (yet), but wondering if anyone else has experienced this? Its just weird that he was eating fine up until this point and the leap is almost over.