I have made incubators of 3/4" plywood,3/4"plywood with 3/4"foam & 1/4" plywood foam sandwich.
They all worked about the same.Incubators are not closed systems . The warm air is constantly being replace with cool air through the vents. Insulation is most useful in power out situations. Will hold...
I have trapped many bobcats with box style traps . Bait with fresh bait, whole chicken , squirrel or rabbit. I use road kill often. Hang by the feet in the rear of the trap. Remember cats
hunt mostly by sight, must be visible.
I built a forced air 3/4" plywood box 16"x18"x20" The little giant heating element could not reach incubating temperatures.I believe the little giant thermostat could not handle a heating element large enough to heat the box you want to build without the addition of a relay.