Why Is My Dog Suddenly Becoming Aggressive?
September 29, 2009 by admin
Filed under Care & Training Q&As
We have 3 dogs. A 1 1/2 y.o Australian Cattle Dog mix, a 1 1/2 y.o. Beagle mix and a 4 y.o. cockapoo. Up until about 3 weeks ago they all stayed outside during the day and came in at night. The Cockapoo is going blind so we now have her in the house all day. The problem is that the Aussie is starting to get agressive with the Cockapoo when she is let into the house.(She doesn’t do anything when the Cockapoo is let outside) She has also growled and snapped at my daughter twice now. I can’t think of anything that has changed other than having the Cockapoo in the house all day. Could it be jealousy? Any training suggestions?
Related Cockapoo Training & Care posts:
- Dog Aggressive When Putting On Leash?
- Why Would My Dog Suddenly Try To Attack Another Dog When He Has Never Done That Before?
- How Do You Prevent Accidents Around The House?
- How To Kennel Cockapoo When I Have Company And Have Him Not Be So Loud?
- My 4 Yr Old Cockapoo Has Been Having Accidents All Over The House. Any Suggestions?




The aussie is having dominance issues. You need to correct the problem before it gets worse. Also do take the aussie in to the vet it could be an underlying problem that is just starting to show up. Good luck. and Also keep the aussie away from your daughter til the problem has been fixed. You do not need your daughter to get hurt.
Are they all neutered/spayed? If not, it can help. Take a training/socialization class, they are fun and you’ll learn a lot!
OH, and a cockapoo is not a “breed,” it’s a mix/mutt too.
If it were my dog I would take it to the vet first. If a dog starts acting mean for no apparent reason it could be in pain.