Just for information sake.... I have used levamisole (the Big 'L' Pig and poultry one) and it did not affect my pleco, b/n, gibbicep or clown Loaches. I researched very thoroughly to find out what affect it would have if any on my fish and all these fish that are normally susceptible to meds were fine using the standard dose of 1ml per 7 litres. HTH

I cannot speak for the avian form but I can for Big L.