Alien Abduction of birds solved

I recently lost 4 king Quails, 2 Zebra finches and 2 Budgies. i had no holes in the aviary. I knew i had mice but couldn't work  it out. My dogs like to chase mice and 1 had dug up some of my paving. i found when repairing the paving my dogs went crazy digging up the sand. Next a huge MF Rat ran into the aviary and into a hollow log my finches called home before they disappeared. i had found my bird killer :(