Is flixweed toxic to ducks?

[DataJager]

I live in New Mexico, have a breeding pair of Pekin ducks and a yard full of flixweed . According to this article it is toxic to cows, however it is just fine for humans.Does anyone know if it is toxic to ducks? Obviously I won't feed it to them if I don't know. I would rather be safe than lose my ducks.


This is flixweed:

 

[veronicasmom]

http://ddr.nal.usda.gov/bitstream/10113/9257/1/IND43954300.pdf

This says there are problems in more than just cows that eat it, and specifically mentioned poultry. Having had to deal with plant toxicity (not flixweed) and losing two ducks to it, I would err on the side of caution and not let them eat it. JMO