Dogs seem to do a lot better in heat than humans do.
Water is needed
And the fantastic fan to help circulate air. We had two one in front set to exhaust and one in the rear set to bring air in. Made for good circulation.
All shades puilled down and turned to block the sun, Patio awning deployed to shade the side of the RV.
Our dogs would lay on the vinyl floor and move from time to time to get water and find a cooler spot.
This worked when the inside temp would approach 80.
We've been in 110 degree outside heat with our two Keeshonds (very furry). At the time we didn't have A/C in our RV. We tied them up outside where they could get in the shade under the RV or a tree. They would dig a small pocket in the earth and lay in it for a while, move away for a short time and then come back, like they were letting the spot cool off. Drank lots of water. We would spray them with a mist sprayer from time to time.