Supervision is the only way and teach her to "LEAVE IT".
Sprinkler heads were one of Lakota's favorites, still are, when they are on. She is not afraid of water, she loves to drink & water pic her teeth when the sprinklers are on. Lucky for me, her and hubby, she hasn't been chewing them.
By me they are about $50 a head to replace.
Lakota - WGSD 1/13/10
Wolfen - WGSD 12/31/14
Bull -WGSD 2-10-10
Apache - Shiloh Shepherd 12/15/02 - 6/9/15
Kiya - Shiloh Shepherd 5/15/04 -12/19/25