The Stardew Valley Expanded mod is a great way to add additional content to the game.
The Free Dusty mod
The Free Dusty mod is a free mod for Stardew Valley that allows players to have the character Dusty living in their town. He looks like he’s from All Dogs Go To Heaven or maybe the neurotic comic relief dog from Balto. Once you’ve given Dusty enough pets, he’ll appear in the game and you can interact with him.
The mod is compatible with the game’s multiplayer mode, and also adds HD portraits for Dusty. The mod makes it so that Dusty, the dog, is no longer crushed by his doghouse, and also changes the UI and textures to black and purple, and makes the Stardew Valley map look toned down.