So this is a real life game of Snake.

@Jjrock  

 
Lmao, I can only imagine how puzzling it would be.

“Her tail grows depending on how many ponies she has in it.”  
That just makes me want to ask what it was like before she ate anyone. Was it some short stubby wiggly thing that was too small to even help her move and she had to drag herself around with her front hooves until she caught her first tester wt which point it grew to accommodate? Or was it a super thin almost rope like tail that’s the same length and those ponies helped her fill it out?  
Either way anything following her tracks or archaeologists in the future are going to be really confused.