Scientifically speaking it's one of the three most adorable things in ark, along with the otter and ovis, but it does have a practical use, they have an interesting expertise at detecting weather, I can't describe it to you in words so go watch shipwreckt's video on it. Otherwise it's not very useful, unless there are storms on Ragnarok with its next major update, it's adorable though!
DO NOT believe that this reduces weight on its inventory. As of today AUG 2020 I tested stacks of meats and berries etc, IT DOESNT. But instead it increases spoil timer of foods, meats and berries on its inventory. ⬆️ to prevent ppl from false informations!
I love this cinnamon roll he is useful for scorched earth. They can detect nearby weather changes. Barking at the sky is sandstorm,tail wag and sound is lightning storm, digging is heatwave and sniffing at the sky is rain
Weight: Jerboa's total weight is HALVED on your shoulder. Ex. Let's say your crystal is 80 weight. If you have jerboa hold the crystal and put him on your shoulder it would weigh 40. Check top utility comment for his weather prediction!