Hi everyone. My male Pekin duck, Lucius, started coughing two days ago. I thought it could be gape worms but he hasn't been "gaping." He seems to only cough in the evening, but that might just be the only time I've seen it. I've read that round worms could cause coughing so I was thinking of deworming them. Of course if he looks like he is feeling worse everyday I will take him to his vet, but I'm trying to avoid some expenses. What do you all suggest I should use for wormer?