Overdue Mastiff

Question
Hi my female is 65 days today. I am getting concerned because her temp has dropped since wed. As of last night it was 98.6. So I thought for sure she was ready. She is really being lazy and laying around, but no panting or heavy breathing. She is attached to me and is following me everywhere. I'm just wondering when I should become concerned and start thinking c-section. I bought her from a breeder who "said" that her 1st litter she had 14 with no problems. When do I start to worry.  Any suggestions would be great. Should I walk her?
Thanks

Answer
Hi Tabatha

It takes 7 days for an egg to fertilize, so even by the calendar date may say 65, she may have needed a few days to fertilize before anything happened.

Mastiff's are know for thier need for c-sections, so I wouldn't worry about that.

Just hang tough and let nature take it's course.