I was at Bianco Hills and I hatched a Yoshi, he was a baby. I carried him and tried to get him to eat butterflies, he wouldn't. He wouldn't eat the small birds either. I saw a Goomba up ahead and he ate that.
"Oh, Ok! He only eats enemies, cool."
But then I heard a dog barking???
I followed the voice, and it was on an unreachable hill on the outerlimits beyond the invisible wall.
Not only was there a dog but 100's of earth animals. Squirrels, birds, racoons, skunks, etc. And a pack of dogs.
The dogs were barking at me and baby yoshi. I felt safe though because of the invisible wall.
HOWEVER, the dogs walked through the invisible wall!! As they approached us, baby yoshi hopped out of my arms and scurried away, dogs chasing after him.