Since female dogs in heat give pretty good signals, experienced breeders can tell when the time is right for some protection between litters. (wileypup.com)
I've just read your comments on dogs in heat and am grateful for your clear, concise answers. (breeders.net)
The program does not cover any other medications or procedures, such as dogs in heat, pregnancy, blood work for dogs aged seven or older, or any other special circumstances. (hartforanimals.org)