(1) In a county with a dog control program, upon finding a dog engaged in killing, wounding, injuring or chasing livestock or upon receipt from a complainant of evidence that a dog has been so engaged, the dog control officer or other law enforcement officer shall impound the dog.
OR ST
§ 609.155
In Texas, offending dogs share the same status as coyotes that destroy livestock.
(a) A dog or coyote that is attacking, is about to attack, or has recently attacked livestock, domestic animals, or fowls may be killed by:
(1) any person witnessing the attack; or
(2) the attacked animal's owner or a person acting on behalf of the owner if the owner or person has knowledge of the attack.
(b) A person who kills a dog or coyote as provided by this section is not liable for damages to the owner, keeper, or person in control of the dog or coyote.
In Texas mam, threatening dogs are treated the same as a Coyote. Now go read up some more on our Tx penal code , and you'll see plenty more including our trespassing laws that will really upset you apparently !