We adopted a lab mix from the shelter as a companion for our current lab mix(a male). When we adopted Sadie, the shelter informed us that she loved all other dogs. We have had her for almost a year and she seems to be aggressive to dogs other than ours. I know that she plays very rough and sounds mean with our other dog, Chase but I do not think she is playing when she comes near our neighbors dog and starts growling. I am not sure what happened between living at the shelter and coming to live with us. Our other dog, Chase loves every animal he comes in contact with. While she just seems to be overly protective. My sister is adopting a dog in the near future and it frightens me that Sadie might attack the new dog when we stay over her house. What is the best way to introduce the new dog to Sadie?Are there programs that could help my dog socialize better? Why would she change her behavior so much when living with us compared to the shelter? Thank you for any suggestions.


