[xiju]

I don't know why they dig but I went through the same thing last summer when mine were younger. They dug holes in my lawn, holes in my gardens and even dug up tulip bulbs which they would run off with. Now, at ages 1 1/2 and 1, they don't dig anymore. Now they use the garden to play hide 'n seek, flattening smaller flowers as they race by. I guess it's better than digging everything up. LOL