Dream about having to put dog down expresses your need to grow and expand. There may be hidden hostility or aggression in some aspect of your relationship or situation. You are trying to suppress your emotions instead of confronting them. This is unfortunately a lack of self-love. You need to use your feelings to overcome your fears.
Having to put dog down dream is a premonition for someone who is overtly gay. You need to pick up your pace and work on achieving your goals more quickly and efficiently. You are lacking a sense of belonging. This dream indicates your idealized version of someone you know in your life. Your fort is under attack.
If you dreamt about having to put dog down:
This would mean you can talk about a whole variety of issues that previously may have meant little or nothing to you. If you are looking for love, then feed your mind and socialize.