Can you ask your vet how many mg of praziquantel your bird needs for flukes?It looks like my local Tractor Supply has Zimecterin Gold Equine Paste in stock. It’s 0.26oz per tube has 1.55% Ivermectin and 7.75% Praziquantel
One ml of Zimectrin Gold = 77.5 mg praziquantel and 15.5 mg Ivermectin.
The most common praziquantel tapeworm dose is 4.54 mg per pound of body weight, which is about 0.3 ml Zimectrin Gold for for a five pound chicken.
The praziquantel dose for treating liver flukes could be much higher, so please do ask your vet what it is.