"Alright, come on. The lights should kick on in a moment or two. We haven't used this area for a while now, so, the system might be a little slow on the uptake, but don't worry. We'll get you fitted and start the investigations on how to make you better, little guy. We'll also get your maw measured properly for the nice long dildo that'll keep you occupied most of the time."
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Oh, yes, his muzzle has been formed permanently open like that, BTW. So any sorts of oral exams can be done. Or deeper still if you're of the mind. ;)

Just moving the rubber horse indoors and with his tack. Was able to get the muzzle open fully, as shown, and able to color it properly. The one thing so far is the teeth -- I couldn't find a means of hiding them. So, when I use the Cock-O-Rama tools to give him said oral filler, it might just do the hiding for me. Anyway, enjoy!