Pet Jealousy: Signs Your Pet Is Jealous (and What to Do)

You bring home a new puppy, and suddenly your older dog is sulking in the corner. A new baby arrives, and your cat starts peeing on the bed. Your partner moves in, and your dog growls whenever they get close.

Is this jealousy? Science says yes—at least something very similar to human jealousy. Here's what's happening and how to address it.

Do Pets Experience Jealousy?

The Science

Research by psychologist Christine Harris at UC San Diego found that dogs showed jealous behaviors when their owners interacted with a stuffed dog that barked and wagged its tail. The dogs pushed between the owner and the "rival," snapped at the fake dog, and tried to regain attention.

While we can't know exactly what animals feel internally, their behavior mimics jealousy:

• Attention-seeking when owner interacts with others
• Aggression toward the "rival"
• Signs of stress when attention goes elsewhere

What It Really Is

Whether we call it jealousy, resource guarding of social attention, or something else—the ASPCA recognizes these behavior patterns as real and in need of addressing.

Signs of Jealousy in Dogs

Attention-Seeking Behaviors

• Pushing between you and the "rival"
• Nudging your hand when you're petting another pet
• Jumping up when ignored
• Barking or whining for attention
• Performing tricks unprompted

Possessive Behaviors

• Guarding spaces (your lap, spot on the couch, bedroom)
• Guarding you (positioning between you and others)
• Growling when others approach you
• Blocking access to you

Regression

• House training accidents (especially marking)
• Destruction of items belonging to the rival
• Chewing or destroying when left with rival
• Clingy behavior

Aggression

• Growling at new pet, baby, or person
• Snapping or biting
• Intense staring
• Raised hackles

Signs of Jealousy in Cats

Behavioral Changes

• Increased vocalization (meowing, yowling)
• Following you more (or following you less—withdrawal)
• Demanding attention when you're with others
• Interrupting interactions (walking across laptop, etc.)

Territorial Behaviors

• Spraying (especially in areas the rival uses)
• Inappropriate elimination
• Over-marking (scratching, rubbing on everything)
• Blocking access to you or areas

Aggression

• Hissing at rivals
• Swatting
• Ambushing
• Redirected aggression toward you

Regression

• Hiding more
• Eating less
• Overgrooming
• Appearing depressed

Common Jealousy Triggers

New Pet

The most common trigger. Your existing pet suddenly has to share:

• Your attention
• Space
• Resources
• Their routine

New Baby

Everything changes:

• Less time for pet
• Strange sounds and smells
• Restricted access to rooms
• Your stress level rises

New Partner/Roommate

A human intruder:

• Takes your attention
• May be in "your" spaces (bed, couch)
• Changes routines
• Unfamiliar scent

Divided Attention in Multi-Pet Homes

Sometimes jealousy flares when you temporarily focus on one pet:

• Taking one to the vet
• Training sessions with one pet
• One pet being sick and needing extra care

Managing Pet Jealousy

Rule #1: Don't Punish Jealous Behavior

Punishing jealousy:

• Increases stress
• Worsens the association with the "rival"
• Damages your relationship with your pet
• Doesn't address the underlying emotion

Maintaining Routine

Keep your pet's routine as consistent as possible:

• Same feeding times
• Same walk times
• Same sleep arrangements (if possible)
• Protected one-on-one time

When everything else changes, routine provides security.

Individual Attention

For dogs:

• Daily one-on-one time (even 10 minutes)
• Special activities that are just for them
• Verbal affirmation when they're calm around the rival
• Training time (mental engagement with you)

For cats:

• Dedicated play sessions
• Grooming time
• Quiet time in their favorite spots with you
• Treats and affection when calm

Gradual Introductions

For new pets or people:

• Slow, controlled introductions
• Don't force interaction
• Create positive associations (treats when rival is present)
• Allow retreat options

Counter-Conditioning

Change the emotional response to the rival:

1. Rival appears at a distance
2. Good things happen (treats, praise)
3. Rival leaves
4. Good things stop
5. Repeat, gradually decreasing distance

The goal: rival's presence = good things for your pet.

Environmental Management

Reduce conflict opportunities:

• Separate feeding
• Multiple resting spots
• Baby gates to create safe spaces
• High spaces for cats to escape dogs/children

Address Resource Guarding

If your pet guards you:

• Don't encourage protective behavior
• Reward calm behavior around others
• Teach "go to your place" cue
• Consider professional help for aggression

Specific Situations

New Baby

Before baby arrives:

• Practice sounds (recorded baby crying)
• Practice routines (walks at new times)
• Allow exploration of baby items
• Reduce attention gradually (not all at once when baby arrives)

After baby arrives:

• Protected pet time daily
• Positive associations with baby (treats when baby is nearby)
• Never leave pet unsupervised with baby
• Don't banish pet from baby areas entirely (creates resentment)

New Pet

• Follow proper introduction protocols
• Maintain existing pet's routines
• Give existing pet some advantages (fed first, greeted first)
• Separate resources (bowls, beds, litter boxes)
• Equal but not identical attention

New Partner

• Partner should become treat dispenser
• Partner does positive things (feeds pet, plays, gives treats)
• Don't exclude pet from bedroom immediately
• Maintain your pet time
• Partner shouldn't discipline pet initially

When to Seek Help

Professional help (veterinary behaviorist or certified animal behaviorist) is needed if:

• Aggression toward humans or animals
• Self-harm behaviors
• Severe anxiety
• Dangerous situations involving children
• No improvement despite consistent effort
• Your own safety or the rival's safety is at risk

What NOT to Do

Don't:

• Get rid of the new pet/partner (unless truly unsafe)
• Punish jealous behavior
• Isolate your pet
• Force interaction with the rival
• Expect instant adjustment
• Give attention only when jealous (rewards the behavior)

Do:

• Be patient
• Reward calm behavior
• Maintain routine
• Provide individual attention
• Make introductions gradual
• Manage the environment

The Bottom Line

Pet jealousy is real, common, and manageable. The keys are:

1. Keep routines consistent
2. Provide individual attention
3. Create positive associations with rivals
4. Be patient (adjustment takes weeks to months)
5. Seek help for serious cases

Your pet isn't being "bad"—they're responding to a perceived threat to their social bond with you. With understanding and management, most pets adjust to new family members over time.

Related: Introducing a New Puppy to an Older Dog Related: Managing a Multi-Pet Household

Frequently Asked Questions

Can cats get jealous of a new baby or partner?

Yes, cats can exhibit jealousy-like behaviors when a new person enters the household, often manifesting as inappropriate urination, withdrawal, or aggression toward the newcomer. Cats are creatures of routine, and any disruption to their established patterns or attention can trigger stress-based behaviors. Maintaining your cat's routine and providing dedicated one-on-one time each day helps them adjust.

How long does it take for a jealous pet to adjust to a new family member?

Most pets begin to adjust within two to six weeks, but some may take several months depending on their temperament and the nature of the change. Consistent routines, positive associations with the newcomer, and ensuring your pet doesn't lose their valued resources or attention help speed the process. If jealous behaviors escalate or persist beyond a few months, consult a veterinary behaviorist.

Is pet jealousy the same as resource guarding?

While related, they're distinct behaviors. Jealousy involves competing for the owner's attention or social bond, while resource guarding is about protecting tangible items like food, toys, or sleeping spots. A jealous dog might push between you and another pet; a resource-guarding dog might growl when another animal approaches their food bowl. Both require management, but the training approaches differ.