Bottle feeding suggestion

Hi there momshies! Ask ko lang if you have experience the same situation with your baby. I started bottle feeding few weeks ago using avent bottles. It goes well naman. Then bigla nlng nagstop si baby magdede sa bote. Inaayawan nya na. So we use pigeon peristaltic soft bottle. Dumede sya once but now, ayaw nya na. ?what could be the reason? My baby is now 2 months old. Breastfed.