Aw bless her, this weather dont help do it. Hopefully she may be in labour, as my chihuahua started to pant and her eyes looked huge she kept watching me all the time, and would go into her box all the time only coming out now and again for a small drink. She had her first pup after 6 half hours. Then 5 hours rest and again in labour with the next pup arriving after another 5 hours. She did so well on her first whelping and that was two weeks ago. Good luck and hope all goes well, take lots of pic as it would be lovely to see them. xxx