i have just come back from holiday which was only a week.our four goldies have been in this kennel frequently with no problems.we went out for a meal the other evening for a hour and a half.when we got back she had scratched through the carpet and the underlay to the concrete below and was panting qiute heavily,i have one bitch at the moment in season.is it stress or what.any suggestions would be most welcome.

I wonder if she's hot? 

she is at the moment asleep and we have taken her out as usual with the rest of them .i am completely lost on this one