Actually, in Texas it's illegal to relocate and release wild hogs except under very certain circumstances, and in no case may sows be released. Boars that have been castrated and checked for disease may be released into a high-fence preserve that has passed state inspection and regulation. There are no other exceptions.

You may transport live hogs to a certified holding facility which will then resell them to a processor.

Hogs create a lot of problems, and if a game warden learned that you had released wild hogs, you'd have considerably more trouble than you would want.