I have two steppe runners housed together, one male one female both about 4 months old, and the female who usually spends more time hiding has become increasingly social and keeps making a chirping/clicking sound and opening her mouth this past few days. It almost looks like a hiccup. She's eating normally, hasn't gotten thinner, isn't aggressive, and still loves being handled, but I can't find anything about this behavior in their species. I have a video of her in action. Could this be a mating thing or one of their species' many quirks, or should I be concerned?