All females are different but most females will develop a pattern. The majority of my females have always come in heat every 6 to 9 months. If your female has a litter of pups that should not effect her next heat. Always count the months from her last heat cycle, not from when she had pups. I have had some females that would come in every 6 month like clockwork and others every 7 to 9 months. In my 13 years of raising yorkies I have never had a female go longer than 10 month before having her first heat cycle or longer than 10 months between heats but there are exceptions. |