"They said they'd get back to me and so I sat with the dog for an hour or so, but they never got back to me. It was getting quite late by then so I went home and got an old towel to wrap it in and left it with a note."
She called the council again and this time she was told that for privacy reasons they couldn't give out the owners' number but that they also couldn't call them themselves. Instead they would send a street cleaner to pick up the body.
"That made me so mad - it was someone's pet, a part of their family. I get that they couldn't give me details, but the fact they couldn't call the owners themselves to let them know their little dog had been killed by a car, that was just disgusting."
Ms Arblaster picked up the dog and took it to an after-hours vet clinic which said it would track down the owners.
The next day, she got a call and a text from them, which said: "Hi Sara - this is just to say thanks for being there for Missy, she was a wonderful 11-year-old, well loved part of my family, it gives us some comfort that she was not alone and in the company of a kind soul like you. Thank you so much for not leaving her on the road."
A council spokesman said it seemed that the person at the call centre gave incorrect advice.
The council's correct procedure is that if the dog can be identified, policy is to contact the owner and "compassionately advise them what has happened". The same approach was taken during working hours or after hours.