Rooster showed up and we’re clueless!!!

Hi forum, I joined this group because my husband and I have been adopted by this rooster? We are in Louisiana where cockfighting is still legal, I think because I see lots of A-frame huts around. This rooster showed up under our oak tree and just stands there and picks around and doesn’t really crow but kind of growls in the morning. He’s been in the same area for over 2 weeks. We have been giving it dry cat food and bird seeds and feel as though there are enough bugs around if that’s what they eat. If you can give me any information about this bird perhaps I can figure out where I can place him that he would be safe and have a nice life. Thank you all for any help you can offer.
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Is he aggressive?