on left boob ds sucks away heftily. Suck swallow nice rhythm. On right boob he suck suck suck swallows. Never gulps faster on letdown. Sucks for 20 mins and not happy. On left he'll suck for 10 mins solidly and be happy. He has always fed mostly on one boob every feed since birth. Thing is no probs him feeding off two. Butnow he is refusing the right boob if I offer it first and howling tip the other is fed from. The boobs feel the same am worried about this. I know they have fave boobs but this is not great. I've fed ds1 and dd til 17 mths and been through similar things but this is now prolonged. Any ideas?