Ouroboros Spine Starburst

Time from time Kau would spit the rock out, only to roll on her feet, pounce at it or dig out from the loose sand it was hiding within and finally with her toy secured firmly in her jaws, she would slide down on her side and roll around in the hole again. When Samani approached with a stick in her mouth, Kau did not react right away. Without moving herself, she followed her sister's trajectory with her eye only. 

She chose to settle nearby and Kau gave a warning growl not to come too close. However, that thought was interrupted, when she lost grip of the stone and it slid further down in her throat, obstructing upper airways. Kau panicked, got to her feet, caughed and retched violently, until - luckily - the rock slid out and fell on the ground. She looked down at it in an offended silence, then turned to Samani and focussed her gaze on the stick.

If enough mental pressure was applied, just maybe she would get the toy without too much struggle.