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Everything You Need to Know About Cats Peeing in Sink

Everything You Need to Know About Cats Peeing in Sink

Owning a cat is rewarding, but sometimes it is a challenging relationship. First, a cat promotes positive emotions, boosts your energy, and helps with mental wellness. Moreover, patting your feline friend is an easy way to relax. While cats demand a lot of attention, they’re affectionate and give good company. Although cats have a reputation for varying moods, you should still pay more attention to any sudden change in your pet’s behavior. One major behavioral problem is cats peeing in the sink. 

To begin with, you wouldn’t expect such behavior from such a hygienic animal. Additionally, the choice of your sink is odd. Luckily, research shows that this is not a case of your cat being naughty but a sign of discomfort. In essence, your cat is trying to tell you something. So, do you want to know why your cat is peeing in the sink? Read on and discover the reason behind this unusual behavior.

Cat in sink

What is Litter Box Avoidance?

For any cat owner, litter box problems are the most frustrating. After bringing your cat home, a lot of time and energy goes into litter box training. As such, you don’t expect your cat to develop elimination problems. However, if your cat avoids the litter box, there’s no need to panic. 

Some cats avoid the litter box altogether, while others use it only for defecation or urination, but not both. Unfortunately, your lovely feline friend finds an alternative to the litter box. In most cases, this could be your favorite place to sit or the sink. If your cat avoids the litter box and pees in the sink, it’s a sign that all is not well. 

Why Is My Cat Peeing in the Sink?

If your cat starts urinating in the sink, don’t take this as a sign of behavioral problems. Whether this is a one-time occurrence or a regular habit for your cat, try to figure out the reason behind the behavior change. Below are some reasons for your cat’s elimination problem.

  • Medical Problems

One of the most common causes of litter box avoidance is the discomfort caused by illness. To begin with, consider if your cat has ever exhibited such behavior before. If your cat has no previous history of litter box avoidance, sickness should top the list of causes. Now, if a cat experiences pain while urinating in the litter box, a change of location is the first alternative. As a result, you’ll see the cat change its urination place, and one safe option becomes the sink. 

In essence, cats peeing in the sink is a cry for help. Therefore, don’t rush to punish your lovely companion. Instead, call your vet and schedule an emergency appointment. 

Cat in bathtub
  • Dirty Litter Box 

Before considering medical problems as a reason for litter box avoidance, check the condition of the toilet. For a start, cats are particular about their toilets. As such, you should expect litter box avoidance if the litter box is dirty. If the litter box has clumps of feces, a smell of urine, or it’s long overdue for a cleaning, your cat avoids it. After all, a cat is a hygienic animal with every minute spent on self-grooming. 

To make matters worse, a dirty litter box is a health risk for the cat and the family. Firstly, the risk of fungal infections increases, salmonellosis, and cat scratch fever. Some infections move from cats to humans. Secondly, the stink of a dirty litter box affects the air quality in your home.

  • Uncomfortable Litter Box 

Another reason for a sudden change in litter box use for your cat is lack of comfort. When training your cat to use a litter box, the suitability of the space is crucial. As such, consider if your cat has outgrown its closed-in litter box. Moreover, if you have changed the litter box, you might have a similar problem. 

If you have brought another cat into the house, make sure to spread the litter boxes. Cats are territorial and love privacy when eliminating. In addition, avoid sudden change of a litter box and stick to the same product your cat loves. If you suddenly introduce a scented litter box, your cat might avoid the litter box altogether. For these reasons, learn the kind of litter box your cat loves and place it in an ideal location.

  • Inadequate Litter Boxes 

For most cat lovers, one is never enough. As a result, you’ll find many homes with several cats, but this comes with unique litter box challenges. Firstly, you have to decide whether to provide multiple litter boxes or have a multi-cat toilet. 

Unfortunately, it’s not the easiest of decisions as you might have to retrain all the cats after any change of litter box. Secondly, you might face resistance from the older cats who fight for their territory. With inadequate litter boxes, cats peeing in the sink becomes a common problem. In short, your cat tries to tell you there’s a problem which you’ve to resolve fast.

  • Stress 

Have you made significant changes in your home? Well, any such change might stress your cat and cause behavioral issues. Indeed, your cat might feel unsafe around another pet or change in location of the litter box. Cats peeing in the sink is a sign of stress, and it’s a problem that requires quick resolution. 

Whether you’ve brought in another pet, remodeled the house, or there’s a new occupant in the home, your cat might cat up. While such changes might not bother anyone in your household, cats are susceptible to any change. For this reason, make your cat feel secure amidst any changes. More importantly, look out for any other change in the cat’s behavior related to the changes in your home. 

Cat in bathtub and cat near it
  • Aging 

Your beloved cat changes behavior with age. You should always expect some erratic behavior as your cat ages, just like with humans. If your old cat pees in the sink, try to make the litter box more visible and easily accessible. 


For any cat lover, inappropriate urination is the most frustrating behavior. Cats peeing in the sink can easily break the relationship. Nevertheless, you can resolve the problem by figuring out the underlying cause. In such cases, always talk to your veterinarian to rule out any medical issues. After all, you don’t want such conditions to worsen and affect your lovely companion. Litter box avoidance is a blessing in disguise for you and your cat. The vet might end up diagnosing a severe medical problem in your cat. Whatever you do, don’t overlook the change in litter box behavior.