My mini pin-chi mix ia a 10week old female and has been in my home for 4 days.
I also have a neutered 6mos old JRT male. He's a doll baby and a treasured family member!
The new girl is nippy,growling and occasionally biting me when I do something she does not like,( taking away a toy/bone, stopping her from fighting with my JRT)
I'm not totally green in the training arena but I've never in my life had such a small dog and want to make sure I do whats right with her.
My JRT has always responded to a loud low voice. NO! No Jumping! etc. I also would hold his muzzle if he tried to play or soft bite and say NO.
This does not work with her. If i hold her muzzle she gets even more aggressive. Yes I took her to the vet right away, she is very healthy but the vet says she is "dominate aggresive"
I've done some web surfing on aggressive chi's but cant find any info on the particular cross that I have.
Any help would be appreciated!
JCarol

I know I'm not going to be a lot of help to you today because I have the same problem you do. I have an older Chi that is just laid back and goes with the flow most of the time. Our little girl that is 4 months old is a different story. She growls, barks, and at times she'll bite. I have tried it all and it still hasn't worked. So when you figure out how to fix it, please let me know and I'll do the same.

I hope that you get a lot of good advice.

First of all.... dogs may need to establish who is really "in charge" here, and they will do that naturally. You need to let them work that out... and I don't mean that you can't stop the pup if she is causing pain... just allow them to figure out who is in charge, and then things will settle down.
Be prepared to find out that SHE is in charge, not your older dog, and that is OK.

Having said that, pure aggression is not OK. BUT.. it has only been four days, and it is a 10 week old pup, who, depending on where you got it, may not have had any interaction with other dogs and may have been taken away from the mom too early.

Google NILF and start your dog NOW on that training. It will help YOU be in charge of both the dogs.

What do you do when the dog nips at you? And what do you mean by "aggressive" with the other dog? It's hard to tell sometimes, if it is true aggression or just feistiness. How did you introduce the dogs?

I hope that others will have good info for you, but maybe you can give a little more specific info?

Well, things are a bit better here, So far it seems that the older pup is in charge when outside and the inside is still up for grabs. I did find the NILF website and was happy to find out I was already doing most of the things recommended. Believe me....I am in charge!! As far as the aggression issue with the Chi mix, Some of what I thought was aggression I think may be puppy playing, she has not hurt my older pup and I've just been letting them work it out themselves. She was growling at me when I touched her lower back,belly or when I would take away a bone, but I've been working with her every day and making sure I pet her in the area's she dislikes and then rewarding her with a treat. She growled at the vet when she was examining her so I make sure I touch her in ways a vet may have to. She is very treat motivated:) I dont know much of her history, I know I am her 3rd home in 10 weeks, that her 1st owner paid $500.00 for her so I would assume that meant pet shop??? The second owner that I got her from had 2 XLarge dogs that would not leave her alone and she had her for about 1 week. If and when she nips at me I sat a loud low NO and stop doing whatever it is we were doing,I put her down and turn my back or walk away. As far as being aggressive with my other dog she's just growling and barking, but after having watched them for a few days I do believe it's just playing. But it does get quite loud! I introduced them outside with my older dog on a leash, I had 2 foster pups before and learned from my mistakes. He is doing 100% better that he did with the fosters! We all sleep together which I know some dont recommend but we've always slept with the older pup so another one was no big deal:) The biggest challenge I have now is my older pup misbehaving when we go for walks. Yesterday was my worst experience walking him ever, he seems to have regressed since we now walk the new pup too. All in all I'm fairly pleased with the way things are going! Thanks for your help JCarol

Oh my... sounds like that poor baby has been through a lot. Have a lot of patience, it sounds like things are going really well.

Stick around, people have a lot of good advice!