Only with my Great Pyrenees but he does it when it's dry sometimes too, but if it's wet he loves digging and making a mess of himself. The other two, a Chihuahua and Spaniel don't bother with it. What kind of dogs do you have?
we love labs also... theese were found in a ditch on a busy road last year when they were around 6 weeks old and we couldn't find where they came from so we ended up taking them home(planning to find them another home) but fell in love with them .... On e was very shy and took several months to get her to let people mess with her and she can still be that way towards strangers