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Tue Aug 7, 2018, 08:29 PM

Looking for advice: Brother's shih tzu has become aggressive toward dogs since older dog died

Hi all,

My brother and sister-in-law had three shih tzus (older female, male, younger male, all de-sexed) who were always friendly and got along with our dogs very well. The older male liked to hang out on a long leash for about 20 minutes each day, sitting on the grass on their front lawn and watching the world go by.

While his older brother was sick and dying, Petey was very subdued and didn't eat much and was very deferential to the older one. When the older male was euthanized, Petey started to want to sit outside - something he'd not usually done. Recently, he's become aggressive and attacked another dog outside twice. This was a dog he knows and previously had no issue with. My sister-in-law said she cannot understand it, unless Petey feels like he now has to "protect" the house. She said that he was always the dominant one, but perhaps Petey thought that the older male was. She talked to the neighbor tonight and told her Petey would not be outside anymore unless it was in their fenced backyard.

They are coming to visit next week and of course we'll be cautious, especially since we have a new male Petey hasn't met yet. Any suggestions as to how to introduce them (other than the usual "introduce them outside of the house or on neutral turf"?) Can anyone guess what's happened to Petey now?

I will crate my dogs if I need to, and she will do the same with Petey.

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Reply Looking for advice: Brother's shih tzu has become aggressive toward dogs since older dog died (Original post)
phylny Aug 2018 OP
dhol82 Aug 2018 #1
phylny Aug 2018 #2
msongs Aug 2018 #3
phylny Aug 2018 #4

Response to phylny (Original post)

Tue Aug 7, 2018, 08:32 PM

1. Sounds like Petey has now assumed the alpha dog position

Not sure why but it sounds like the gathering might be a problem.

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Response to dhol82 (Reply #1)

Tue Aug 7, 2018, 08:33 PM

2. Yes. It will not be a problem because I'll keep my dogs crated and safe.

Does sound like he's now asserting himself.

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Response to phylny (Original post)

Tue Aug 7, 2018, 09:21 PM

3. why crate your dogs when it is the other dog that is violent? nt

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Response to msongs (Reply #3)

Tue Aug 7, 2018, 09:24 PM

4. Simply, to keep my dogs 100% safe.

They don't mind their crate. They snuggle together and get lots of positive reinforcement there (treats and the younger one eats in there in the morning so he doesn't poop in my house before I can take him out!)

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