Aw, totally normal yan sa 3 months, mama! Babies go through growth spurts and sometimes they're just not as hungry, especially if parang satisfied na sila or medyo sleepy lang, one of my mum friends noticed the same thing with her baby, sometimes every 5 hours na walang interest sa milk, tapos biglang back to every 3 hours ulit. Just watch na talagang kumukuha sya ng enough milk overall sa buong araw, at check with your pediatrician kung worried ka talaga kung adequate na ang intake niya or may ibang concern, pero most of the time it's just normal feeding variation lang. Ganyan talaga ang babies natin, hindi fixed schedule ang appetite nila hehe!