My kids also went thru phases of dont't eat this, only eat that, eat non-stop, eat nothing, etc. Sometimes last 1 day only somtimes last over 1 yr. (My son's current 'dont't eat meat' phase is slightly over a year and counting; my daughter's 'dont't want to drink milk' phase lasted slightly over 6 months and re-surfaces now and then.) I never tried pedisure cos I think it's really expensive. But I have been told over and over again by many doctors that kids are just like that sometimes and as long as they are active, seem happy and normal, it will eventually pass.
Hard not to worry, I know. I still fret over it all the time. But I guess there's not much we can do but keep trying to offering the same foods. Perhaps sometimes a new plate/cup/bowl would help.