Dreams or visions about the cow tell you that you are very strong, you can handle a lot of stress, and you have no trouble overcoming problems and obstacles are easily avoided. But the cow also tells you that you are showing careless and stubborn behavior, which you use as an excuse to get out of trouble.
Another explanation is of course that you have the idea that you are stuck in a place in your life, there is little progress. Dreaming or seeing a vision about an ox, it's about strength, perseverance, progress, overcoming obstacles and possibilities that will come your way. The cow and the ox are both the basis of life, the basis of a new dream, wish, and possibility, the beginning of something that might be a success, but it does require a lot of attention.