Petco Text Logo
Petco Pet Logo
  • Two Easy Ways to Start Earning Rewards!

    rewards header
    Become a member today!
    Members-only pricing and offers, personalized care notifications, Vital Care points back on every purchase and more!
    Petco Pay LogoBecome a credit card member today!

    Earn 2X Pals Rewards points at Petco
    when you use Petco Pay!

    APPLY NOW
    Learn More About Petco Pay Benefits

Why is my dog aggressive at daycare, attacking dogs and staff?

Updated on September 23, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Female | spayed | 75 lbs

I work at a dog daycare and my dog comes with me. She was good.She plays in group play 1-2 times for 2 hours. She now tries to run out. She's becoming aggressive in the facility. When I walk dogs with her, she randomly attacks them, but she's fine with them outside. She now walks alone. Including her, dogs bark/show aggression when dogs pass their rooms, so it can be a loud environment. In her room, my coworkers have told me she sometimes growls at them when they open her door to say hi to her.

1 Answer

Most Helpful Answer

Jennifer Ladd, DVM

Answered By Jennifer Ladd, DVM

Veterinarian

Published on August 31, 2017

I am concerned that she is developing a negative association with the daycare and other dogs. She may be getting overly tired, developing some protective aggression, or even some fear based aggression. I would recommend giving her a break from the facility with slow return with loads of positive reinforcement. In more severe cases you could also try some Trazodone. It is not a sedative, rather increases the amount of Serotonin in the brain. This results in a more content and happy pup. You could use this as a training tool while you are re-integrating her, and then wean her off as she has successful days.
Vote Icon1Pet Parents found this answer helpful

Smart Picks for Smart Questions

Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Share

Styled arrow button