Dreaming of a running bull and a horse can hold various meanings depending on the context of the dream and your personal associations with these animals. Here are some interpretations:

1. Strength and Power: Bulls are often symbols of strength, determination, and power, while horses can represent freedom, grace, and stamina. Seeing both animals in your dream may indicate a balance between raw power and graceful movement in your life. It could suggest that you have the strength to pursue your goals but should also embrace the freedom to explore different paths.
2. Conflict or Competition: If the bull and horse appear to be in conflict or racing against each other, it might reflect a situation in your waking life where you feel torn between two strong forces or desires. This could indicate a struggle between assertiveness (bull) and a desire for freedom (horse).
3. Energy and Motion: A running bull and horse can symbolize a surge of energy or a need to take action. It may suggest that you are feeling motivated and ready to make significant changes or take on new challenges.
4. Instincts and Emotions: Both animals can represent primal instincts. The bull may point to repressed anger or aggression, while the horse could signify emotional expression and passion. Your dream may be prompting you to acknowledge and integrate these aspects of your personality.

Consider your feelings during the dream and the events in your life that may relate to these themes. Reflecting on these elements can help you gain deeper insights into the meaning of your dream.