A dream about dog collar indicates restraint and a lack of freedom in personal pursuits, and is also a sexual symbol that usually refers to unrestrained instincts and drives.
see it - is a warning against thoughtless actions that may lead to complete ruin of your achievements so far
wearing the dog collar - means a crash in the field of personal finances, prompting the dreamer to become more frugal
dog collar - it can have two meanings, on the one hand it is an expression of submission and discipline, and on the other hand of oppression
black dog collar - is a harbinger of broken relationships or disappointment
red dog collar - is an expression of shameful deeds and behavior that usually brings shame.
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