Has he started solids? If so, it's quite normal for them to have decreased milk intake. My LO's milk intake in the day reduced by half when she started solid. But in the evening she still latch every 2-3 hours, so I'm not too worried.
Hey, Don't worry. Generally when the baby starts having solids then the interest for having milk reduces gradually. As long as the baby is eating properly and getting interest in more solids, it should be fine.
If he started solids, some may lose interest in milk
Growth sprut
Cherish Lim