I have a chicken that has been losing weight for almost a month now; she is eating, but not as much as my other two and lost weight gradually. Yesterday she began wheezing although otherwise acting completely normal. I took her to a vet this morning and she said it was probably worms in her lower respiratory tract so she gave her Ivermectin and will prescribe an antibiotic (TBD) that I can give her at home. However, I am still worried that it could be an infection since she didn't do labwork, but listened to the chickens lung sounds which were clear, and did a general physical inspection. Is it possible that an infection is still the problem and I should insist on blood tests or am I being a hypochondriac?