Good With Dogs:⬛⬛⬛⬛⬛⬛⬛
The Rafeiro do Alentejo dog, or more commonly known as the Portuguese Watchdog is a steadfast, noble dog that needs a confident and knowledgeable owner. These dogs are guard dogs and are very vigil at guarding their property, though they are not known for aggression, they are wary of strangers and have a deep bark to alert the owners that something is wrong. This breed is more alert at night compared to the day. With proper socialization and training, the dog should bark and block the stranger from entering the property/home until the owners arrive and tell the dog it is okay. This breed is not known for aggression or useless tricks, they are very laid-back and tend to watch rather than play.
My Mountain Cur gets annoyed with kids. He acts like a grumpy old man around kids. He tolerates them but doesn't play with them.
Rafeiro do Alentejos can't be left outside all day and can't go hunting because they are extremely suspicious of strangers, so you can never let them off leash. But they do make a great guard dog.
I have no experience with the Rafeiro do Alentejo breed, but found this link (immediately after reading your question) that looked like it provided helpful information, separate links to breeders, as well as a link to the foreign affairs agent of the Portuguese A.C.R.A. (I am not connected in any way to any of these links.)I hope it helps. http://www.dogbreedinfo.com/rafeirodoalentejo.html