This mod adds two different arachnids to Stardew Valley as livestock you can adopt for your farm. Spiders go to the coop and Scorpions go to the barn. They both can be milked for venom every other day. The venom can be sold, as scorpion venom is considered to be one of the most expensive liquids. This mod also adds two new items to the game. Venom, and powerful venom, both which can be obtained from arachnid livestock.

It adds:
-Spiders
-Scorpions

Arachnids produce venom everyday that you can sell. They have their own section in the animal store too.

If you want to have arachnids in game, you will need to add this:

    "Arachnid": {
      "Types": [
        "Scorpion",
        "Spider"
      ],
      "Buildings": [
        "Deluxe Barn"
      ],
      "AnimalShop": {
        "Name": "Arachnid",
        "Description": "Arachnids produce powerful and valuable venom",
        "Price": "16000",
        "Icon": "assets\\animal_shop_bug.png"
      }
    },

to the config.json in the Paritee's Better Farm Animal Variety folder. Obviously this means that this mod requires Paritee's Better Farm Animal Variety.
Which can be found here: https://www.nexusmods.com/stardewvalley/mods/3296

You also need to copy animal_shop_bug.png into Paritee's Better Farm Animal Variety (BFAV)'s asset folder.

Future plans:

I intend to make more arachnids for people to adopt. Including a smaller scorpions for coops and a larger spider for barns.