If I remember correctly, you said that you wanted Dennis to space out your work so you did not have to pay for the mounts at all at one time, which Dennis did. And then you complain that you did not get your work timely. I understand you are not happy with Dennis, from all the times you have posted, but you had no complaints with the quality of the work, correct? I think you said your Elk was great.
Not taking sides here, but the guy was out for months, and he certainly had a backlog before he was sick, every taxidermist does, maybe not as large as Dennis. I suspect they're a reason he had a large backlog, and that's the quality of the work he turns out. While I understand everyone wanting their stuff as fast as possible, sometimes that just not possible. If he spends all his time answering calls and email, when is supposed to finish the work. He has already said that he has hired help to get him caught up.
If it was me and anyone kept disparaging by business, you had better had all the facts on your side and not just hearsay. Just friendly advice. And no, no one has asked me to say anything.