In a large colander, rinse the pinto beans. Discard any damaged or misshapen beans. Transfer the beans to a slow cooker that’s 6-quarts or larger.
In a microwave safe bowl, add the vegetable oil, onion, jalapeño, cumin, oregano, cayenne pepper, and 1/2 tsp salt. Cook until onions are translucent about 8 minutes. Stirring occasionally about every 1-2 minutes of cook time.
Stir the onions into the slow cooker. Add the bay leaves and remaining tsp of salt.
Pour in the water and stir in the chicken bouillon.
Cover and cook on high for 8-10 hours, until the beans are tender.
Remove the bay leaves.
Taste the beans and adjust the seasoning as necessary.
Serve.