Just like humans, pet cats tend to favor one side, using one paw or lying down on one side more than the other.
About one-third of the cats appeared to be "right-pawed" while another third were truly southpaws.
Male cats had a higher chance of being lefties than female cats.
In that case, about half of the cats favored one paw; just one used both equally.
"Left-limbed animals, which tend to be right-hemisphere dominant, show stronger fear responses than right-limbed animals, which tend to be left-hemisphere dominant."
Right-pawed cats also appeared to be more playful to their owners than left-pawed cats.
Other signs can include hiding more than usual, eating and drinking too little (or not enough) and not using the litter box correctly. »