A final thing to consider, most dogs go into heat twice a year, and many are working like a clock. Every six months, owners are already expecting their dog going in heat. And yes, in most cases, simply looking at symptoms if you know when to look for them, is enough to tell if the dog is in heat. Veterinary help may be necessary if you either want to breed your dog, or if your dog had problems before. Do you need more information? Read our article series about female dogs in heat!