Legality of a dog carrying your firearm?

I was looking at reviews of a Onetigris dog harness today and in the video the guy is walking his dog with a holstered loaded gun attached to the vest of the dog.I can't seem to find anything online about it so just curious as to what y'all think about it or if its even legal in my state (I'm in Texas). Would it be the same as open carrying? Or if you have a LTC can you completely conceal it on your dog?Link to video: https://www.youtube.com/watch?v=F3FoCdtoVjI via /r/CCW https://ift.tt/2HTeuiE