I suspect i have a rooster with gape worm. He sways his head back and forth at times and has a big squishy crop that we have drained and got stinky dark liquid out of, rinsed him a few more times, gave him yogurt diatomaceous earth and pumpkin seeds ground up. Few days later better, still squishy big crop, not huge, drained him, rinsed him and out came stuff that should be there, and no stinky smell. But both times i saw the same little 1/4 long worms. i believe he could have gape worm. what is the best thing to use to rid him of this. The horse paste dewormer strongid or wazine? or other suggestions. thank you