This request about driving with pets to Panama keeps coming up, time after time. I wrote an extensive article about this - here is the link:
Hope it helps.
PS: Pets can die very quickly when left inside a vehicle during the day - even with the windows left open. If you must leave a pet inside the car, place a block of ice on the floor and leave the windows open a crack, and PARK IN THE SHADE. A reflector on the inside of the windscreen cuts the heat in half. Towels hung from the windows also help as well - remember the sun moves during the day - if the vehicle is in the direct sun, your pet will suffer, and possibly die.
Remember - the heat down here cooks the water out of your battery - check your battery every few days and add water often.