How to stop your male chihuahua marking in the house

How to stop your male chihuahua marking in the house

How to stop your male chihuahua marking in the house.

Is your chihuahua marking in the house?  Young male dogs will love to mark their territory. But it’s not the only reason a dog marks in the house and believe it or not marking is not confined to intact males. Females and neutered males may also mark under some circumstances.

But, it’s unbelievably annoying and will need patience and some detective work to get to the bottom of why your chihuahua is marking.

What marking is and isn’t

It’s important to know the difference between chihuahua marking and full on urinating. It should be easy to see as a full bladder empty will leave a puddle. Marking is just a squirt and usually up something vertical. You will see the tell-tale yellow drips that are surprisingly hard to clean off.

Firstly, if your chihuahua is emptying his bladder in the house and he has previously been fully potty trained he might be ill and need to see the vet. Rule this out first before you take any further action.

But if he is still a young dog you may just have more work to do and need to go back to basic potty training. You can read more about potty training here.

Castration may not be the answer and could make it worse.

Some owners will jump straight to castration as a cure for a chihuahua marking indoors. But this is a very drastic action to take and may not cure it. It would also need to be done at a very young age before the need to mark becomes instinct.

However, castration should only be done for medical reasons, not behaviour and not on a dog under one as he needs the testosterone for his development.

Castration can also make a dog fearful as the testosterone gives him his confidence. As chihuahuas are prone to fear biting and reactive barking, taking away the testosterone you could end up with a fearful reactive dog who marks because of stress.

Why do they do it?

So, once you have established that your chihuahua is marking and not urinating what can you do?

There are three main reasons why your dog may mark in the house and out on walks;

Marking territory

Any dog will want to mark his territory but unlike us they can’t put up fences, so they leave a chemical message instead. Other dogs will sniff and get the message of who lives here. It is likely that your chihuahua’s territory extends further than your drive.

They will also over-mark other animal smells as well as other dogs. Chihuahuas are small and will often go to some lengths to get their mark higher than other dogs, so they look larger.


This is the same as your business card. Your chihuahua marking is leaving his details in a communal space for other dogs to ‘read’. From this information another dog can tell the gender, sexual status and rank. Females in heat may mark to leave messages for male dogs about her sexual availability.

A dog’s primary sense is smell and his nose is a marvellous thing. It is important for your dog’s mental health that he gets the opportunity to have a good sniff while out on a walk. You can find out more about how amazing their noses are here.

Anxiety or stress

A dog or bitch may mark if they are feeling stress or anxiety. If a new person or pet is introduced into the household, your chihuahua marks to cover-up the unfamiliar smells that are bothering them. Once it smells right again, they will start to relax.

An example of this may be peeing on a new pet’s bed, peeing on a new partners bed, up a visitor’s suitcases or on a new baby’s blanket. It can be hard to spot the signs your chihuahua is stressed, read this article about stress.

How to stop your chihuahua marking

  1. Clean all the areas he has marked with an enzyme based cleaner. Avoid anything that has ammonia in it as this is similar in smell to urine. Use a black light to see any urine spots.
  2. Make sure your dog is getting plenty of potty breaks and is on a regular schedule for outside breaks. If necessary, go back to toilet training day one.
  3. Also make sure your chihuahua is getting plenty of exercise and stimulation. Young males are full of energy and can need two walks a day. Introduce him to a canine sport if you can.
  4. Is your chihuahua marking because of stress or anxiety over a new person in the house? This might manifest itself as your chihuahua peeing on this person’s bed or belongings.

To help your chihuahua get over this your new incomer needs to spend some time making friends with your chihuahua. They need to make huge fuss of your chi and become a provider in your chihuahuas eyes, by walking, feeding grooming and playing with them.

Also wash the place where he has marked with an enzyme based cleaner, and if it’s a bed spend some time with your chihuahua on the bed playing so it changes significance.

  1. A new baby could be a major stress for any dog, make sure lots of good things happen for your chihuahua around the baby. Wash any blankets that have been targeted and follow the advice from number 4.
  2. If you have visitors or workman in the house, lift anything that might be a target.
  3. Don’t bring other unknown dogs into the house without prior meetings on neutral territory. The Humane society even go as far to say, don’t allow you dog to watch other dogs out of the window.
  4. Take care when introducing new animals into the home. Take time to introduce them to each other calmly. It may take a few days for things to settle down.
  5. Supervise your chihuahua and if you see him about to cock his leg then issue a sharp, stern no, then take your chi outside. Praise him like mad when he pees outside.
  6. To stop your chihuahua marking when you can’t see him, reduce his access around the house. Do this with stair gates or if necessary, tether him to you with a training lead. This way you will remember to take him out for potty breaks.
  7. If you can’t pin down the anxiety that is making him mark, try to calm him down with a diffuser or some CBD oil. You could also consult an animal behaviourist to help you pinpoint the cause.

Dealing with chihuahua marking can be a real frustration, but if you can find the trigger you have a chance of sorting out the reason they’re doing it. The good news is they do seem to grow out of it.

Books by Chihuahua Power


  1. Helena Brown
    March 8, 2020 / 10:26 am

    We have recently, as in less than two weeks, rehomed two mChihuahuas, the male was a known marker and we are taking steps to reduce it. Unfortunately he has come into a house which was occupied by our elderly but now sadly deceased Pug. Would we be right in thinking that he still smells the boy? Hektor never marked or peed in the house.
    We are going to introduce a crate for him in the meantime. It seems to be worse either during the night or early morning. The female has no problems, she has been scrupulously clean since arriving.
    We are cleaning with a good enzyme cleaner and hope that once they have their second vaccination, getting out and about will reduce the need for marking.
    Is there anything else we can do?

  2. Helena Brown
    April 17, 2020 / 4:37 pm

    I thought I would let you know that we have cured our male of his marking. We started crating him at night, he actually loves it and now goes in by himself. We ensure that both him and his female companion get out into the garden as often as they need and probably for the first time in their lives, he is seven and she is six they are being walked outside, we are using our exercise period.
    Strangely she has defecated a few times, we do not crate her at night so this has been found on the puppy pads we still use, when we get up in the morning. We are ensuring that we do not give her food in the evening. Problem is the little boy needs more food than she does being a high energy dog and it I s difficulty give him something and not her.
    So this proves that whatever the age with work you can retrain.
    Never having been a Chihuahua owner before I am very impressed by these two. They are both lovely dogs. I would recommend them to anyone with the time to take them on.

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