Not sure why I didn't think of putting a blanket or towel over the vent. That's definitely worth a shot! Thanks a ton!
Mold doesn't really scare me because I gutted that entire room and used mold resistant drywall and paint. I knew the humidity in that room could pose an issue so I wanted to be preemptive on that.
As soon as I crack the door the room almost immediately cools down a few degrees but yes I do need to figure something out for the animals sake cuz I'm not always home.