Pet Health Care Guide
    Cats

    Cat Behavior

    Kneading, litter box habits, biting during petting — decoding the everyday behaviors cat owners ask about most.

    Most of what owners call bad behavior in cats has a reason behind it that makes sense from the cat's side: a litter box it doesn't like, too much petting in one spot, a new cat brought in too fast, or a day with nothing to do. The guides in this section start from that reason and work toward changes you can make at home.

    Litter box problems come first in this section for a reason. A cat that suddenly starts peeing outside the box may be ill rather than upset, and bladder problems are common enough that the Cornell Feline Health Center lists stress and changes in routine among the risk factors for lower urinary tract disease. So cat peeing outside the litter box starts with when to see a vet, before any advice about boxes and litter.

    If your cat bites in the middle of being stroked, why does my cat bite me during petting? explains the warning signs that come before the bite. Bringing home a second cat? Read introducing a new cat to your home before the carrier opens. New kitten owners can start with what you actually need before bringing a kitten home, and anyone going back to the office can read do cats get lonely when you go back to work?

    Articles

    Cats

    Do Cats Get Lonely When You Go Back to Work?

    Cats are far less indifferent to an empty house than their reputation suggests. Here's what boredom and loneliness actually look like, and what genuinely helps.

    Justin Manuel Lantigua Germosen 7 min read
    Cats

    Introducing a New Cat to Your Home: A Step-by-Step Guide

    Introducing a new cat too quickly can cause lasting conflict. Follow this gradual, proven step-by-step process to help your cats (or cat and other pets) adjust.

    Justin Manuel Lantigua Germosen Updated Jul 23, 2026 6 min read

    Litter box problems are medical until proven otherwise

    This is the most important sentence in the section. A cat urinating outside the box is not making a point about your absence, your new partner or your choice of holiday. Urinary tract disease, crystals, kidney problems, diabetes and arthritis all produce exactly this behavior — arthritis because a high-sided box becomes painful to climb into, which is invisible unless you think to look for it.

    The behavioral causes are real, but they belong second in the queue. Litter type, box location, how many boxes there are relative to cats, and how recently something changed in the household all matter. The standard guideline is one box per cat plus one, in separate locations, which more households fail than meet.

    Petting-induced aggression is over-stimulation, not treachery

    A cat rolls over, invites contact, enjoys it for two minutes, then bites the hand doing the petting. It reads as arbitrary. It usually is not: repetitive stroking builds up sensation until it tips from pleasant to irritating, and cats have a much lower threshold for that than dogs. The exposed belly, meanwhile, is a display of trust rather than an invitation — it is the most vulnerable part of the animal.

    There is nearly always a warning, and it is easy to miss because it is small: the tail starts twitching, the skin along the back ripples, the ears rotate back, the body stiffens slightly. Stopping at that point rather than at the bite is what changes the pattern, and it teaches the cat that the signal works — which means it keeps using the signal instead of escalating.

    Introductions fail when they are rushed

    The single most common mistake is putting two cats in a room together on day one to "let them sort it out". Cats are territorial in a way that sociable dogs are not, and a bad first impression is remarkably durable — a fight in week one can set a relationship that takes months to repair, if it repairs.

    The alternative is slower and duller: complete separation at first, scent exchange before sight, visual contact through a barrier, and supervised time together only once nobody is reacting at the previous stage. It typically takes one to two weeks, sometimes longer, and rushing it is what turns a manageable introduction into two cats who spend years avoiding each other. Even the friendly behaviors are easier to read once a cat is settled.