farmquilter

My birdhouse is on a 4" metal pipe set in cement, have one of those dog neck cones at the bottom of the house. This morning my Callie was setting ON the house, went and found the 4 eggs are gone. Callie is the cat that seems to be 'spring loaded' and always gets up high.
Should I put a piece of wood on the back of the house and stick it in the pipe to raise the box higher. Do not want it too high for other birds to set up house and scare off the blues.

Any hints that are easy to apply or install is greatly appreciated. I really like the birds and they usually set a second time.