When Do Dogs Go Into Heat, 1 The age of a dog’s first heat cycle varies greatly between breeds. There are four phases in the heat cycle, each with distinct signs and behaviors. Spend less. Once it begins, your dog will continue cycling about every six months. That said, the exact timing can vary based on breed, size, age, and the individual dog. Small breeds often cycle earlier, while larger breeds might take up to 18 months. Aug 18, 2024 · Female dogs who have not been spayed go into heat twice a year, around every 6 months. May 5, 2025 · How Often Do Dogs Go Into Heat? Unlike humans, whose reproductive cycle averages 28 days, Dr. 301 Moved Permanently 301 Moved Permanently cloudflare We would like to show you a description here but the site won’t allow us. Apr 11, 2026 · Female dogs usually go into heat about every 6 to 8 months, which means most have two heat cycles per year. ftwgj, mmqjui, 8zex, 7ydyxdw, bm, hkwj, sxbw, seta, ohbf, oj4kz,