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My 5-month-old puppy is aggressive and biting. What can I do?

Updated On September 23rd, 2025

hi My new puppy acts like he isn’t tame? I got him last week breeder won’t answer my calls he is a greater Swiss mountain dog at first I thought it was because he didn’t know me but it’s been a week and no improvement he bares he’s teeth at me and has actually bitten me I didn’t sign up for this when I took my puppy home and I’m on the verge of giving him up I paid full price for him I feel like I’ve been ripped off he’s 5 months old what can I do?!?!

1 Answer

Most Helpful Answer

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Answered By Joy Fuhrman, DVM, MBA, CPA

Veterinarian

Published on April 13th, 2018

It sounds like your puppy may not have been socialized with humans before coming to live with you. If this is the case then it will take a more than a week for him to become accustomed to interacting with people. I recommend you work with a certified dog trainer or a veterinary behaviorist in your area to socialize your pup. You could also look into puppy training classes.

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