This was a fun experiment. The first picture was taken using full flash aimed directly at the frog, and the frog was positioned right against the wall. As expected, it looks bad. I noticed that the shadows and reflection on the wall seemed to improve once I was at least 4-6 feet away. For fun, I tried using my diffuser for the second picture. I placed the frog about 6 feet from the wall, and it looks much more natural. As you can see from the shadow under the frog's arm, I bounced the flash from the side. But, aside from that, it definitely is better than the first picture! The light seems a lot "softer" and accentuates the soft texture of the frog.
All setting were the same, and I was about two feet from the frog.
ISO 320, f/4.5, 1/60, 70 mm
