Sibling rivalry is competition or jealousy between siblings, often over attention, belongings or who gets a turn. It can turn an afternoon into a hearing about who touched whose things. Start by checking safety. Stop hitting, threats or humiliation straight away. If both children are safe and able to speak up, stay nearby and give them a little room to solve the disagreement.
When they need help, hear each child's view, name the feelings and ask for a solution they can both accept. Then check whether it worked. I would rather a child leave a fight knowing how to ask for a turn than leave knowing how to make a stronger case against their sister.
Why does sibling rivalry happen over such small things?
The thing they fight about may be small. What it means to them can be bigger. A place beside you on the sofa might mean attention. An extra pancake might mean, "You like him more." Children notice differences long before they understand the reasons for them.
Temperament matters too. One child wants company as soon as they get home; another wants quiet. A younger child wants to join a game but keeps changing the rules. An older sibling wants their belongings left alone. Age gaps can make it harder to find something both children enjoy.
Before you deliver a lesson about kindness, check the ordinary things. Have they eaten? Are they tired, bored or stuck together with nothing to do? If sibling fighting reliably starts while you make dinner, try a snack and separate activities before that time tomorrow.
Everyday disagreements give children a chance to practise asking for what they want and hearing a refusal. "Work it out" asks a lot of children who have never been shown how. Give them the words while they are calm: "I'm still using this. You can have a turn when I'm done."
When should you step in, and when can you stay out?
Stay nearby if the argument is about a manageable disagreement and both children can say no, leave or suggest something else. You might say, "I hear you both want to choose the game. What could you try?" Then wait.
Step in for physical aggression, threats, damage to belongings or a power imbalance that means one child cannot refuse safely. Name-calling needs a boundary too, especially insults about identity, appearance, disability or belonging in the family. "You can be angry. You cannot use her disability to hurt her."
A quiet child who gives in every time may need help as much as a loud one. Check privately: "Did you want to agree, or were you worried about what would happen if you didn't?" Do not treat silence as agreement. Separate children first if anyone feels unsafe.
How to stop siblings from fighting without picking a winner
Use this sequence for everyday disputes where both children can participate safely. First let everyone settle. "We're taking a break. We'll talk about the game once we can hear each other." If one child is overwhelmed, my guide to helping kids handle big feelings walks through that pause.
- Give each child a turn to speak without interruptions. "You say you were still using the pencils. You say you thought she had finished." Ask, "Have I got that right?" Hearing both accounts does not make the children equally responsible.
- Help them name the feelings. "You felt angry when they were taken. You felt frustrated because you wanted to draw too." Let them correct you. Keep the limit clear: being frustrated does not make grabbing okay.
- Ask, "What could work for both of you?" Let them offer ideas before you supply yours. Younger children might need two choices, such as different pencils now or a turn after the current picture.
- Agree on a specific plan. "You'll finish this picture, then put the pencils on the table for him." Check that both understand and freely agree. Nobody has to lend a special personal possession just to end an argument.
- Later, ask, "Did that plan work? What needs to change?" If it failed, adjust it. If it worked, notice the action: "You asked when she'd be finished and waited for the answer."
If you saw a child hit or take something, address that directly. Return the item, help the hurt child and hold the safety limit. Hearing both perspectives does not require you to overlook what happened or make both children apologise.
You also get to stop an endless negotiation. "We haven't agreed on turns. Let's pause this game and try again after dinner." A pause can help with a shared dispute. Avoid taking an activity away from both children when one has been targeted; address the harmful behaviour separately.
Can comparing siblings make the rivalry worse?
"Why can't you be more like your brother?" gives children a reason to resent each other. So do quieter labels: "the easy one," "the sensitive one," "our little troublemaker." Even praise can become a role a child has to defend.
Describe this moment instead. "You put your shoes away without a reminder." Or, "That noise bothered you. Let's find somewhere quieter." Neither sentence needs a sibling for comparison.
Watch the expectation that the older child should always give way. "You're older, you should know better" can leave them feeling their needs count less. You can expect more developed skills while still protecting their turn, privacy and belongings.
What to say when they shout, "It's not fair"
Fairness deserves a real answer. Start with, "Tell me what feels unfair." Sometimes the child has noticed something you need to change, such as the same sibling always choosing first.
Other times the difference has a reason. "He has an earlier bedtime because he needs more sleep. Your bedtime is later. You both get help settling down." Fair means taking each child's needs seriously; equal means giving everyone the same thing.
Be clear about where equal turns do belong. A shared game's first turn can alternate. A child's need for extra reading help does not require an identical lesson for their sibling. You can explain the difference without demanding that they like it.
How can you reduce competition for your attention?
Try a small, predictable bit of one-on-one time. Read together after the younger child is asleep, let one child come on an errand, or sit with them while they draw. Put your phone down for that stretch and let their interests set the conversation.
Tell the other child when their time will happen too. "This is my time with your sister. You and I will walk the dog after lunch." Keep it separate from rewards for good behaviour. A child who had a rough morning still needs time with you.
How to repair after a bad fight
Once everyone is calm, help the child who caused harm name it specifically. "I knocked over your building because I was angry." Then ask what they can do to put something right. They could help rebuild, return something or replace a cruel message with an honest apology.
Skip the forced hug. The hurt child can need space and still hear an apology. Ask them privately what would help, and do not make immediate forgiveness the price of ending the conversation.
If you yelled or blamed the wrong child, repair your part too. "I shouted before I listened. That wasn't fair to you. Next time I'll pause and hear what happened." They need to see adults take responsibility, especially after we have asked them to do it.
What changes as siblings get older?
Ages 4 to 7
Preschool and early school-age children need short words and adult help with turns. Stay close during a shared activity and practise, "Can I have it when you're finished?" A timer can make a turn concrete if both agree. Do not expect a long discussion after a fight.
Ages 8 to 12
Give children more say in rules for shared spaces and belongings. Agree on what can be borrowed, what needs permission and how turns work before the next argument. Ask each child to explain the other's concern in their own words, without requiring them to agree with it.
Ages 13 to 18 and big age gaps
Respect teenagers' privacy, including phones and messages. "Ask before you enter his room" may prevent more arguments than another talk about kindness. With a big age gap, protect the younger child's safety and the older child's right to separate interests. Being older does not make them the household's extra parent.
When does sibling rivalry become bullying or abuse?
Persistent cruelty, threats or one child being afraid of the other need adult protection and professional help. A child who avoids being home with a sibling or gives up possessions to avoid retaliation needs you to act. Serious physical harm or sexual harm needs a prompt safety response even after one incident. You do not need to decide whether a behaviour meets a definition of abuse before seeking help.
Ask privately, "Do you feel safe with them?" If a child tells you about harm, stay calm and let them speak in their own words. "I'm glad you told me. I'll help keep you safe." Do not press them for details or make them confront their sibling.
Talk to your family doctor or a qualified mental health professional with experience in child aggression and abuse. Separate the children and supervise any contact while you get help with a safety plan. Both children may need professional support. The University of New Hampshire's SAARA Bulletin #3 on sibling aggression and abuse warns that mediation can further harm a targeted child when abuse is present because of the power imbalance. Do not use the everyday dispute sequence above in that situation.
If anyone is in immediate danger or has a serious injury, call 911. For suspected child abuse in Alberta, contact Child Intervention's 24-hour intake line at 1-800-638-0715. The province's child abuse reporting guidance explains what happens when you call. Elsewhere, contact your local child protection service. Seek help promptly rather than waiting for another incident.
Practise when nobody is fighting
For everyday disagreements, our Group Sessions give kids room to practise empathy and conflict tools with peers. A child can rehearse, "I'm angry, and I can ask for space," before they need it at home. In Parent Workshops, parents practise calm communication and limits they can use on a tired afternoon. These programs support everyday skills. Safety concerns need the professional help described above.
For now, pick the argument that repeats most often and make one plan before it starts tomorrow. If you would like help choosing what to practise, Book a Discovery Call.
Common questions
What age is sibling rivalry worst?
There is no single worst age that applies to every family. Younger children often need help with sharing and impulse control. School-age children may argue about fairness and comparisons, while teens need more privacy and independence. Age gaps, temperament and changes at home affect the pattern too. Focus on what repeatedly starts your children's fights rather than waiting for a particular birthday to end them.
Will my children grow out of sibling rivalry?
They may argue less as they gain skills and have more separate interests, but there is no age when rivalry automatically ends. Look for small changes, such as asking before borrowing or accepting a turn later. If conflict keeps disrupting family life despite clear limits and help, talk to a qualified mental health professional. Fear or harm calls for help now, regardless of age.
How do I help my child who is jealous of a new baby?
Make room for the feeling without allowing harm. Try, 'You miss having me to yourself. I can sit beside you while I feed the baby.' Offer a small job if they want one, without making them responsible for care. Keep familiar routines where possible. Supervise contact closely and never leave a toddler alone with the baby. Ask your family doctor for help if adjustment remains difficult or you are worried about safety.
What should I do when my children keep tattling on each other?
Listen before deciding it is tattling. A child may be reporting harm or asking for help with a problem they cannot solve. For a safe, small dispute, ask, 'What have you tried, and what help do you need?' Make the safety rule explicit: they should always tell an adult about hurting or threats. Never punish a child for reporting something that made them feel unsafe.
Invincible Kids runs mindset development sessions for kids and teens in Calgary and online. If something here sounds like your child, book a discovery call and we can talk through what they need.