砂鼠: Mongolian gerbil (Meriones unguiculatus)

not ... at all

even if ...,...cannot

very, exceedingly, awfully / (before a negative form) not at all, at all, by no means

a pet (an animal kept as a companion)

Clipping of トランペット (“trumpet”).

PET (polyethylene terephthalate)

lovable, beloved / cute, adorable

embarrassed, having a guilty conscience: see 顔映し (kawahayushi). / (obsolete) pitiable, pitiful / lovable, adorable, cute

negative form of 可愛い / (figuratively) ingrate, unthankful