Off topic but need help!

Lakken • Pregnant with baby #1
I have a pointer and lab mix dog. He's 10 months old and about 85 pounds. We live in Louisiana and it gets hot here! We don't have much shade in our yard and lawn lord says no pets inside! We have a pool for him and our other dog but he's too big to lay in it. I need ideas to help keep him cooler please!