After a long process, i finally got my ball python to eat. I gave her a week in her new environment and today i fed her for the first time. After I fed her it took her a minute to fully eat the mouse(she struck it on the side, so she had to turn it forward). After she got it all down, she kept opening her mouth, I don't think the tail of the mouse was causing trouble but is this a sign it was too big? she's a small snake so I've gave her a pinkie. I've also heard yawning can be common after eating, is that what it is? Thank you.