We just got back very late from our summer vacation and my neighbour came back to tell me that her dog has dog lice and that my dog may have it now.
That means that my dog would have had to have gotten it like on Monday of last week, since that was the last time he saw her dog, and since then, on our trip, my dog has played with other dogs.
I go see the vet in a half an hour to determine if he has them or not; I really hope he doesn't.