Has anyone seen the new series called "In the Womb" on the National Geographic Chanel? Mom and I watched the episode "dogs" the other night and we were both just amazed. They actually follow four dogs (wolf, labrador, mastiff and chihuahua) right through their life in the womb from conception to birth. The photography is amazing and so is the information they give. Did you know for example that at day 35 exactly - the momma dog can either decide to continue with the pregnancy or adsorb the fetuses! This is actually a wolf trait. They said that in wolf hierarchy only the alfa female tends to give birth if conditions are not good (lack of food etc) so any other pregnant females adsorbs their puppies but continue to produce milk and will help in looking after the alpha females pups. This doesn't happen often in domestic dogs but can if the dogs are stressed. This is what happened this year to my dog mom, she was pregnant and then suddenly she wasn't but continued on with a 'phantom pregnacy' and as a result we didn't get a little sister for me. You can actually watch the show online and here is the link. This is whole series and they also follow cats, humans etc.