Different species create different proteins and other compounds, or different levels of them, so you can be allergic or j tolerant to chicken eggs but not duck or vice versa. Same with cow milk vs sheep/goat.
It sounds like guineas and ducks both have in common high levels of something in their eggs that people can be allergic to. Guess you would want to investigate if other fowl have eggs more similar to chickens or ducks…or just stick to chicken eggs if ducks cause you problems.
If allergic to duck eggs, do check at fancy pastry shops to see which they use. Duck eggs make for a richer dough, so they are sometimes the preferred egg for enriched pastry dough.