We've been trying to bottle train my 8 week old for 4 weeks and we aren't having much luck. We have tried three different bottles and are ready to stay a third. We tried dr browns, avent natural and playtex ventaire with the silicone and latex nipple. He doesn't like any of them. Has consumed an oz or so out if each at least once, but rarely more than that. My husband or MIL has offered once a day everyday and I just started offering multiple times a day this week. Help! Any advice or resources?