A frog that is eating well points to a healthy one, so maybe it changed color in response to environment. On a note apart, FDR appears to lack the two false eyespots behind the horns that characterize an Ornate.
That's a keen observation. The first photo, to me, does look like an ornate though. For the record the second pic looks ornate to me, as well, but I suppose if you cover me up on EcoEarth I will look like an ornate horned frog, too!!! LOL!!!