HDTV (high definition television) HDTV (high definition television) is a television display technology that provides picture quality similar to 35 mm. movies with sound quality similar to that of today's compact disc. Some television stations have begun transmitting HDTV broadcasts to users on a limited number of channels.
Heat usually lasts between 2-4 weeks. Early in the cycle, a female dog may not be receptive to male dogs, although some are receptive through the entire cycle. It can be shorter or longer and youâll know the cycle is over when all her vulva returns to its normal size and thereâs no more bleeding or discharge.
Usually they will have the first cycle around 6 months of age. In my experience as a dog owner, dogs' periods come twice a year and last from a week to a month. During this time, they are extremely horny and beckon for other dogs to hump them, which other dogs often do regardless of gender.