How far along does a mare need to be before you can feel the baby kick? I have a mare that is going 24yr old this year and she's suppose to be preg. and she is due around May 8th 2010. This is her last foal. We had her ultrasounded when she was about 45 days and the vet said she was preg, and too me it looked like it. However thursday another one of our vets came out to give them all theyre shots and asked about when she was due and I told her and she said she may not be, cause she doesnt look very big to her. But her last foal she had she didnt get as big as she did with the others. But what is weird is she developed mastitis about 2 months ago and we got rid of it. But we havent had any problems other than that, so I dont know if she would have lost it without us knowing or what??