hi silverdale lofts .if TRICHOMONAS GALLINAE are present .that little single celled bug , knowen as a protazoa , you are correct it spins like mad , by means of to little legs .knowen as FLAGELLA. as you know, their are 20+ strians of that little bug of which their is weak and strong types. none are visible to the naked eye, the yellow deposits are a product of the birds anti-bodies ,fighting the good fight with the weak types . the strong type no visaible sign . hence canker can be confused with pox... yours in sport