Would it be cruel to move a bird's nest full of chicks to save my dogs?????

erm its bit risky seeing as the they are chicks. The mother may reject the sent you left on the birds. Also the mother would probably not be able to find them unless it is nearby and she can hear their chirping. Its a bit tricky but if i were you i would leave them where they are seeing as they would probably not be able to survive. The chirping may attract the rattle snakes but no more than there are already there. Maybe keep your dogs away from the shed for a while. Good Luck x