I can only describe the sound as a cough. Not sure what it was. I tried to record it but she only did it about 4 times in a row and then stopped. It was the first time I noticed it today. I have some Vet RX on hand but should I keep an eye on her for now? Maybe it was just a fluke? I stayed out there for about 10 minutes after I heard it and didn't hear it again.