Probably the bigger thing to think about is why her throat is sore. And, just be aware in the next few days of whether she's getting better or worse - if it's something like a scratch from a sharp bit of bone or swallowing something the wrong way, no worries. But, it could also be bacterial infection, in which case she might need ABs.
Same advice as for kennel cough, though. Manuka honey is great, wet or sloppy warm meals, keep her quiet for 24hrs and reassess.
The correct number of dogs to own is n+1.
While the minimum number of dogs to own is 3, the correct number of dogs to own is n+1, where n is the number of dogs currently owned.
This equation may also be expressed as s-1, where s is the number of dogs owned that would result in separation from your partner.