After some trial and error, I've decided to expand the range of theme I can draw for commissions.
Currently, I can draw cubs, young males, adults, familial intimacy, size and age differences, BDSM, exhibitionism, underwear, inflation with bodily fluids, forced scenarios, and animal friends (wolf, dog, horse, with an additional cost).
Why the additional cost? Just because I can draw it doesn't mean it's easy. But don't worry, it won't be excessively pricey. I'll remove the additional cost once I'm confident in drawing them. However, by that time, my base prices will have increased.
"But I want more than just a dog and horse." Okay, you can check back in a few years to see if I can do other animals... Tiger and drake are possibilities, but, well, I'm not sure.