Aaron frowned, not happy with the ugly creature that Mike had become. "I guess we need to get you saddled up and make sure you know how to carry me on your back."
The wizard smiled. "That is no problem. His mind is still adapting. Go ahead and tack up."
Mike tried to think why that did not sound good, but he was having some trouble concentrating. As Master started getting the saddle straps tightened, he found that the weight and pressure felt normal - he 'remembered' it.
As the barbarian fighter slipped the bridle over his face, the leather straps reshaped to fit his partially human head. Mike opened his mouth to let the bit settle in a gap between teeth, the salt-metal taste also familiar.
"Good boy." Master patted his neck, and Mike felt a glow of happiness. He wanted to please Master. Then he frowned and shook his head. Master? As Aaron continued to load him up, Mike realized that he was having trouble thinking. He was... what? More pats and words from Master distracted him, but then he realized what it was. He was thinking like a smart horse, not a human. Easily distracted, unable to focus, and subservient to his new Master.