thank you for your answers!
was it easy??
this is HAKU. short, thick tail. sometime she answer using her tail instead of mewing.
and this is BYAKU. long, thin tail. she answer to dad calling only. i want to ask her why does not she respond to mom, if i can speak cat language.
both tail are hooked type. it is called "happy key tail (the tail like a key shape, can open the door to happy)" in japan.
BYAKU: did you do correct answer?? ;)