What season is the peak sales season for pet dogs and what month

The peak sales season is from May to July and around December.

Because the dog is in heat in February and August, she is pregnant for 2 months and breastfeeding for 1 month

So infer from this. Summer and winter are the hot season for dog sales.. Because dogs are in heat or pregnant in spring and autumn. Unless some newborn dogs have uncontrolled oestrus. Other dogs are pregnant and give birth at this time.