The dog is one of the two pets in which you can chooseStardew Valley, with the other option iskat.DoorMaking characterMenu, you can choose from 3 different dog settings.
Some timesMarnieAppears on the 10th day that you can choose a name for your dog.It remains on rainy days, a good early indicator of the weather if you have not checked the prediction the previous day.If the weather is good, it can be found on your farm, mainly around his bowl, just northwest of your house.
You can pet it and fill the water bowl daily and eventually you get the message of two heart "[PET] Love you" that counts on one of the pointsGrandfatherThe sanctuary.