Is my cockerel… purring?

[Mganson99]

I have him quarantined for lethargy at the moment— I have been giving him Corid and he’s improved a lot. I try to spend as much time as I can hanging out in the basement with him so he doesn’t get lonely and today he started making this sound while I was laying on the ground next to the cage. It lasted about 20 seconds and that was it! I’ve heard him do it once or twice before but never this long

https://imgur.com/a/RxP9NnQ

 

[nuthatched]

That's a low key alert noise.

 

[Mganson99]

That's a low key alert noise.

I did have the window open and saw some hawks fly over so that could make sense