Bowie's throat was not slit. I personally read a tweet, earlier today, from JC (KJ father in law), on his actual account. He said, "Bowie's throat was not slit". I believe him because EC said she picked him up in an interview, and JC said also on Twitter that she had zero blood on her. If he were cut, it would be 99.9% impossible not to have a little blood on her shirt. So, I'm betting he was strangled with his leash. Just stating my opinion.
Im also giving my opinion that this could open up a good possibility that there were multiple attackers. One attacked Bowie, while the other attacked KJ. There no way on earth 1 person could render both of them helpless...alone...while a dog is very likely biting...KJ might have helped but would have likely screamed her head off while someone was attacking her dog. If he attacked KJ first, the dog would be barking....possibly biting....and it just doesnt seem plausible that this was done by one individual.