
What do they feed at the kennels?
is it the same as her normal diet? If not the change in food could be upsetting her. Free play sounds good, but there shouldn't be dogs mixing when there is food around, some dogs can be protective over their food & with the noise & excitement of a kennel enviromnent it's not the best place to be having free-for-alls with food around.
The licking of her legs sounds like lick granuloma's which are caused by dogs nibbling at themselves usually through boredom / stress. Nothing to be too concerned about - although I'd be more concerned about why she's doing it. :)