We have a female (Roxie) Rottie that has only once or twice in her 8 years of life shown any aggression and that was towards strange dogs that came on our property.
We brought "Sarge" our 8 week old Rottie pup home last night and Roxie has been tolerable at best.
I was petting Roxie this morning and the pup came up and wanted to join in amd get some lovin and Roxie went off on him.
She didnt bite him and she could have picked him up in her mouth. But she growled and gave two aggresive barks rights in his face and scared the poor little fella to death.
Roxie was raised with a Sheltie(passed away 2 yeats ago) and a cat ( she passed 2 months ago) and she plays with all dogs she comes in contact with.
The breeder said her (Roxie)maternal side should eventually kick in and she would treat it as her own and the puppy would take on some Roxie's personality which would be awesome.
I would hate to have to return this awesome little guy if they cant get along???????