my chihuahuas just had a litter of eight. all appeared healthy, allthough there was a runt in the pack...he seemed to do well. he did eat and grow with the rest. however now, they are three weeks old born Feb 28th, (it is now march 17), he all of a sudden started whining and whimpering in obvious pain. doesnt seem to want to eat. when we touch his neck or head his yelping intensifies. earlier this afternoon we did try to give all the puppies some milk supplement and nutrical...but since it was there first trial none of them really ate much of either..HELP! also, when we first realized something was wrong he was lying on his back with foam/drool coming out of his mouth...seizure??