Also known as zoomorphism, to dream that you are changing into the form of an animal indicates that you are becoming less civilized and restrained, and becoming more free and instinctive. You may be expressing your new-found freedom and independence. Alternatively, taking the form of an animal can also suggest repressed urges that need to be understood and managed. Consider also the qualities of the animal that you turn into and what happens to you in the dream. According to Jung the end of the dream is particularly significant.
Favorable resolutions direct us to the most constructive ways of solving problems, whilst unfavorable dream resolutions contain a warning of negative changes. Dreaming of animal skin could mean you may have found or need to acquire the traits, power and wisdom of the animal concerned.... The Element Encyclopedia
Wearing a pair of tight jeans in a dream may suggest that there is something in the genes that feels too restrictive. Your genetic imprints may express deeply seeded attitudes that drive your personality. Jeans may also represent a rugged attitude.... Ariadne's Book of Dream
To dream of jeans symbolizes how you present yourself to others, and your status in life.
If the jeans were ripped, you are not thinking logically. You need to figure out a new way of thinking about a situation or relationship.
If they were dirty, you want to change something about your personality. Maybe it’s time to break old habits and ways of thinking.
If the jeans were too tight, you feel contrained in some way. Perhaps you feel suffocated in a relationship or repressed by your parents.
To dream about jeans that are too big for you indicates that you are lacking confidence in some situation. You may have been placed in a role that you don’t feel ready for, or are unsure of what to do next in a relationship.
If you dreamed of trying on several pairs of jeans, you need to establish a new self-image in order to fit into a new situation or role. You may be anxious about fitting in with others.... My Dream Interpretation
Now a fundamental part of the American uniform, jeans originally were worn for doing vigorous labor. Today, they are the ultimate in casual wear, so as a symbol, they may reflect a need to take yourself less seriously or dress down some situation that the dream is reflecting.
If someone in your dream is wearing jeans as a noticeable image, the part of you that the person represents may offer you a way to incorporate more relaxation into your psyche.... Complete Dictionary of Dreams