have all sorts of plans to make little coops like yours @TRUE5
by the way, make sure hubby only shoots to scare the hawk off, against the law to kill them- wondering if one of those fake owls would help too?
State statute allows you to kill a hawk if it is killing your poultry.
Citation: OK ST T.29 5-410
Summary:
"Oklahoma law prohibits the knowing and willful killing or molestation of hawks, falcons, owls, or eagles or their nests, eggs, or young. the only exceptions to this prohibition are the taking of a hawk or owl in the act of destroying domestic birds or fowl, or the use of hawks! owls, falcons, or eagles by licensed falconers."
There is more discussion on this statute at
Http://www.animallaw.info/statutes/stusok29_5_410.htm