A dog collar should be snug, but not too tight. You should be able to fit two fingers comfortably between your dog's neck and the collar, a bit less for smaller dogs. This allows for a secure fit without causing discomfort or restricting your dog's breathing or movement. If the collar is too tight, it can lead to discomfort, difficulty breathing, and potential injury. On the other hand, if it's too loose, there's a risk that your dog could slip out of the collar. Regularly check and adjust the collar to ensure a proper fit.
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