The branches and stems are pretty strong, a strong wind wont blow them down unless it was huge storm levels of wind. The monkeys sometimes hang out there.

I'd say that he probably can't tame a horned goat because they are hostile to everyone, they just want to fite the world okay. He could tame a normal goat though.

Just damage is what kills voidblobs, they are pretty tough and made of rage but it doesn't take anything special to put them down. They don't really have any weaknesses either. Their main strength is that they have an appearance of being undamaged. They will look and act fine right up until the moment they die.