I'd suggest rolling back to Desert Yellow then trying this:

You'll need 18 × Xelphatol Apple, 21 × Mamook Pear, 29 × O'Ghomoro Berries

So in one session, feed: 5 Apples, 6 Pears, 8 Berries / 5 Apples, 5 Pears, 7 Berries / 4 Apples, 5 Pears, 7 Berries / 4 Apples, 5 Pears, 7 Berries.

If you try without going back to Desert Yellow now there is no guarantee you'll get Loam Brown as we don't know the exact RGB values your bird is currently on, each colour has a range of RGB that can = that colour. The default is always the same so it's always easier to get right from Desert Yellow.