Hi Debbie, i am still bf'ing my 2 year old twice a day - morning and night - and he has only taken one side for about 4 months now. He used to always feed both sides at each feed and for some reason we always started on the left. Then about 4 months ago he stopped doing the right side at all and started to favour the left. When i try to put him on the right side now he just sucks a few times and then comes off and giggles

I am not sure whether there is still milk on that side or not. I am nearly 8 months pregnant - not sure if that has anything to do with it. I haven't worried too much and have just carried on, i figure that even if the right side has dried up that it will hopefully start up again once the new baby comes. I don't have any infection or soreness or anything on the right side.
Sorry this is probably no help, but just wanted to let you know that i have the same thing happening and it doesn't seem to matter (as far as i can tell!). (Also ours isn't related to ear infections etc either - i think he has just developed a wee preference). All the best.