The more the merrier? Some cats are inclined to disagree.

Felines can cause major disruption to your precincts when they are not getting along, from litter-box lapses to the proverbial cat fight.

“Whether you have two cats, or 20, the secret is to have plenty of territory,” says Dusty Rainbolt, author of “Cat Wrangling Made Easy: Maintaining Peace and Sanity in Your Multicat Home” (Lyons Press, $14.95).

“Cats can have little sub-territories within a room,” Rainbolt explains. “One cat’s territory may be a cat tree. Another’s, the window perch. And still another’s might be a cushion on the couch.”

The trick is to provide as many cubbyholes and perches as possible, so less dominant cats have places in which they can hide or survey the goings-on.

Litter boxes are a frequent flashpoint for conflict in multicat households. The rule of thumb is to have one box for every cat, plus one extra. Having a litter box on every floor of the house is also a must.

If one cat stops using the litter box, the first step is a visit to the vet to rule out a medical issue, such as a urinary tract infection. Next, reconsider the litter-box substrate: Cats generally like a sandy texture, unscented please.

Also consider the access issue. “Sometimes you have a dominant cat who wants to protect his resources – and litter boxes are resources,” Rainbolt says. “So he’ll stand there and say, ‘None shall pass”‘ – prompting the more submissive kitties to head to the nearest corner.

Zero tolerance toward bullies is also crucial. “If you have a cat that tends to get picked on, it’s time to separate him in a different room,” Rainbolt advises. “If they start fighting and you let them work it out, they won’t. It will just cement this pattern and create a victim and a victor, and every time there’s an incident, things will get worse.”