Line slow cooker with a liner.
Wash deer meat and place on the bottom.
Spread meat with butter.
Chop onions and bell peppers and place on top. Slice for fajitas or cut into bite-sized pieces.
Drain can of corn and add to a slow cooker.
Pour in diced tomatoes, salsa, and enchilada sauce.
Cover and cook on low for 8 hours.
About 30 minutes before eating, cut squash and zucchini into bite-sized pieces and add to slow cooker.
Stir into soup.
Replace lid and cook for a few more minutes while you gather bowls, spoons and set the table with garnish.
Serve in a bowl as stew, or over rice or cauli rice. Garish with Greek yogurt or cheese, if desired.