Well, now I'm annoyed.
I contacted the breeder today because I realized I had lost track of the days and she'd actually said she would mail them Monday. Of course, it's Tuesday and she had never said anything to me about shipping them or tracking number, etc.
So I sent her a message. Turns out, she didn't send them at all, because I sent a personal check and "she doesn't take personal checks, only money orders or Western Union". Except, when I mailed the check I very clearly said to her, "If it's fine with you, I will mail you a check today. Please let me know where to mail it". That was the message I sent. She replied with her address.
So she was aware I was sending a check and sent me the address to mail it to. That, to me, seems an awful lot like she was fine with me sending a check. Not sure how else I could have interpreted that.
So now she has a check of mine in her possession that she could cash at basically any time, and isn't going to send my birds apparently. Never had to cancel a check before but I guess I'm gonna have to figure out how now.