Aggressive german shepherd puppy

by Miriam A
(London )


I have a 12 week 7 days old german shepherd male puppy,
I purchased him from a breeder who deliberately lied to us, said he was use to cats, I have two Persian indoor cats Who are nervous and terrified of him, I've installed baby gates for the protection of the cats, my cats are upstairs hiding underneath my bed and not eating.
Which is a concern of mine.
I've had him for a week now, he's a lovely dog likes playing he's quite boisterous normal for a puppy I guess, he's potty trained which I'm so thankful for, and he sleeps well throughout the night,
Two main problems I have, he's nipping quite a lot and goes for the ankles, also He's getting more and more aggressive towards our cats barks and growls very loudly with a stiff body, yesterday he upset the cat, he can see me through the gate, I was comforting the cat and then went back in to see my dog, he growled and barked at me and was attempting to bite me, I was wondering could it be jealousy?
I really don't know what to do, i've tried playing games with both parties on each side of the gate, with rewarding treats, I thought I was making progress, it all got ruined yesterday
He's terrified the female cat, she hasn't eaten and probably won't trust him again she's been hiding under my bed.
I tried contacting the breeder for advice, he's ignored all my messages and has blocked me..
Also has removed his phone number from his advert.

Can anyone give me some advice....

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Nothing In Life Is Free
by: Adam G. Katz

Employ the "Nothing In Life Is Free" approach, so that your dog starts to view you as the "pack leader." If your dog doesn't see you as the leader, then your corrections will be meaningless. So, if you're doing subtle things (inadvertently) to undermine your leadership role around the house-- it will be counter-productive.



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