- We have been out inspecting the routes and we cannot find anything that applies to the entire routes. There has been some party that we have seen that has been a bit messier, but we have not found any reasons for it, he says.

Close-up of one of the stains on the straggly dachshund Shanti's stomach. Photo: Ann Forsberg

So it is uncertain what they are suffering from?

- Yes exactly. Sometimes a vehicle may have had a leak, but in the normal situation we have no knowledge that the salt would dissolve bitumen *, however, the salting itself may feel a bit messy when applied.

Hear all of his reasoning in the clip above.