A dog will begin her heat or estrus cycle at different times depending on the breed but typically it begins between 6 and 8 months of age.

This can vary from one dog to the next. Typically, the heat cycle lasts around two to three weeks. The female's vulva will swell and then bleed for several days. Mating is typically done after being in heat for a good 10 days. Some females have what is called a silent heat. This occurs when a dog does not show the typical signs of being in heat but can still get pregnant. Be careful if your dog is in heat and you do not wish her to be bred.

The female dog comes into heat (estrus) about every six months, although very large breeds of dogs may cycle every 8-10 months. The heat period lasts about three weeks.

A female goes into heat about twice a year. They may skip a heat cycle occasionally, but will seldom have an extra one. The cycle lasts 21 days in dogs. Cats will go into their first heat between 5-8 months. A cat will remain in heat until she is bred. Small breed dogs at about 6 months and medium breed dogs at 8 or 9 months.

Cats come into heat seasonally. They cycle at approximately 21-day intervals during the spring, summer, and fall.

Early Canid Domestication: The Farm Fox Experiment - Behavioral genetics and development may interact in domestication according to this article from American Scientist, March-April 1999. Inherited Activation-inactivation of the Star Gene in Foxes Its bearing on the problem of domestication. Journal of Heredity, 1981. Border collies exhibit a wide variety of looks related to a tradition of breeding almost exclusively for behavioral characteristics.

A female dog (called a "bitch") goes into heat around every six months if she is not spayed. It is only during this time that she is receptive to mating with a male. Signs indicating heat are an enlargement of the vulva and a discharge. After heat is over, the bitch will either be pregnant or be experiencing a false pregnancy.

Females go twice a year into heat. The cycle starts at about 6-9 months of age. Dogs may skip a heat occasionally, if their mental or physical condition is weak.

Although Estrus cycles can vary greatly among individuals, small breed dogs typically come into heat around 6 to 8 months old. Large breed dogs may not come into their first heat cycle until 8 to 10 months old and may be even later for some giant breeds. Puberty in kittens typically occurs at 6 to 10 months of age depending on when the kittens are born. Typical breeding season for cats is February to August.

Canine heat cycle occurs 2 times a year,and lasts for 3-4 weeks. They bleed for a week, cease for a week during their fertile period, then bleed for the last week. If you think your dog is pregnant, gestation is 63 days from time of breeding.

The age of onset of the heat cycle varies with the breed of dog. Small breeds tend to begin cycling sooner, as early as six months of age. Larger breeds begin later, sometimes not until 12-18 months of age. Heat cycles then occur approximately every six months and last approximately three weeks.

It is best to wait until a female is out of heat before she is spayed. During the heat cycle all the blood vessels that lead to the ovaries and uterus are inflamed and this makes surgery more of a risk to the dog. A dog can be spayed if she is early pregnant. You should discuss this with a veterinarian.

Early signs include a swollen vulva and a light red or bloody discharge. Often, a dog’s first heat may be "silent" and accompanied by no or minimal discharge. Male dogs are usually attracted to her, as well.

If pups are not wanted it is best to spay before the 1st heat. Also, the risk of breast cancer in female dogs can be significantly minimized by spaying before the first heat period.

The heat cycle is the mating period for female animals. Cat's normally have their first heat cycle between 5 to 10 months of age with the average being 6 months. Dog's first heat cycle are normally between 6-12 months. Some females of larger breeds may not have their first cycle until they are 12-24 months of age. Remember the above information is general not all females follow these patterns. Consult with your veterinarian if your pet does not seem typical.

Female dogs will have their first heat cycle around six months of age and every six months thereafter. Dogs cycle will last 10-21 days. Cats will also have their first heat cycle around six months of age. Cats are light dependent usually with heat cycles every 9-13 days from January through October. The cycle will last 5-7 days. Some indoor cats will cycle all year due to the constant light times.

Two main source of heat: when air is compressed, it just heats up naturally, compressor efficiency is the other, it can contribute over half of the total heat produced. C ambient, compressing the air to 0.5 bar will raise the charge temperature to 61 C (39C rise) at 100% adiabatic efficiency. Unfortunately most modern compressors operate between 60% to 70% efficiency. At 65%, the actual outlet temperature is 81C (56C rise) !.

We really need to know more about your dog. But yes, we sure can help. There is no universal solution to this problem. Every case is unique. We will analyze the behavior of your dog, try to understand why (his past, what triggers the behavior, the "drive" he is in, his body posture). All those elements interact and each situation has its own answer. CRATE TRAINING is a good way of making the job of house training your puppy a much more enjoyable and successful experience.

Serious breeders find breeding partners at the shows, through their contacts in the club, and through ads in the breed magazine. Most serious breeders are quite choosy about how they breed to and it is suggested to do the same as above, go to shows to contact serious breeders to see if there is any interest. Though most serious breeders are very choosy about stud dogs and usually pick one that has achieved its championship title and has proven itself with quality get.

Both sexes are equally suited to be service dogs. All dogs are neutered before placement so their working behavior will not be affected by hormonal changes.

Females in heat will get the attention of every dog in class - male and female. Generally, all dogs behave very differently around females in heat and will be extremely distracted by her. Moreover, females in heat can leave scents behind that will distract dogs for many days forward. We ask that you leave dogs in heat at home. Under these circumstances, we'd be happy to reschedule you to another class at no additional charge.

Is my female GSD in heat? How can I tell? Some dogs heat cycles may be shorter than average while other dogs may have longer ones.

Reduces your pet's desire to roam in search of a mate -- this also helps reduce the problems of free roaming animals; for example, car accidents and pet theft

We recommend that all mixed breed pets be spayed. Purebred animals that are not being used for breeding or for show should also be spayed. Spaying a female dog or cat involves the surgical removal of the uterus and ovaries. The primary benefit to spaying your pet is to eliminate their ability to have puppies or kittens.