Probably a dumb question about allergens and weaning but here goes. I know that early exposure to allergens is protective against developing an allergy, and that once you’ve exposed them to an allergen that repeated exposure is important. I think each nut is its own allergen, which is why people can be allergic to cashews but not pecans and I eat a wide range of nuts fairly often so as long as he doesn’t show up anything in an initial exposure that should be easy to do. But is each fish an allergen or is fish as a group an allergen? If he has cod does that cover salmon and mackerel etc? I’m vegetarian so he probably won’t have more than one fish meal every week or two and I don’t know how I’d keep up with needing to balance haddock, sea bass, tuna above just fish. I’ve never heard anyone say they’re just allergic to sole, but then I don’t know many people with fish allergies.