I would say about a month to completely settle in. That would be with all other dogs and cats. He was pretty comfortable from day one, the adjustment period was really for all the pets.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD