The dogs don't have to tie in order for pregnancy to occur. You say they were together unsupervised for 20 min? They had plenty of time to tie before your husband came in and found them.
7 pounds should be the maximum weight for a Yorkie, so technically she is not too small breed. The fact that your male is larger puts a different spin on things however. Any ethical and knowledgeable breeder will tell you that is a no-no and could easily put the life of the female at risk.
If you are very concerned about the pregnancy, you could have her spayed now to be safe. I am suspecting you will not want to do that however so I would advise you take both of your dogs to a vet for an opinion on if the pregnancy can be carried safely. Also, you will need to find and experienced breeder in your area to work with on preparing for her delivery should you opt to take that route. |