first of all did the dogs tie ? if they did then you can be quit sure that the job was done so to speak

and you normally have a second mateing to on another day, if they did not tie then she was proberly not ready and you need to put them together again and so on until the tie, some dogs are not ready until later in the season, if you are not experienced at breeding and are not sure what to do you should get help from someone that does as dogs can hurt each other if they are left alone and are not experienced themselves.