The Grey Mouse is a Legendary pet in Grow A Garden that was added during the Blood Moon Event Update on May 17th, 2025. Most players recognize it as a utility-focused pet rather than something meant for raw power or visual appeal. It does not help with crop value directly, but instead supports steady progression through experience gain and movement speed.

In general, the Grey Mouse is used by players who spend long sessions farming, moving between plots, or leveling pets over time. It is obtainable and still relevant, especially for players who value efficiency more than short-term boosts.

How Do You Obtain the Grey Mouse?

The Grey Mouse is obtained by hatching a Mythical Egg. When you hatch this egg, there is a 35.71% chance that the result will be a Grey Mouse.

Most players consider this a reasonably high chance compared to other Legendary pets. In practice, that means you usually won’t need an extreme number of eggs, but luck still plays a role. Some players get it within a few hatches, while others may need several tries.

The Grey Mouse is currently obtainable, so players who missed the Blood Moon event itself are not locked out, as long as Mythical Eggs are still accessible through normal gameplay systems.

What Does the Grey Mouse Actually Do?

The Grey Mouse has a passive ability called Whisker Wisdom. This passive provides two main effects:

It gains around 500 bonus experience every 10 minutes

It increases the player’s movement speed by about 10%

In practice, this makes the Grey Mouse a long-term value pet rather than something you actively manage. Once equipped, it works quietly in the background.

The movement speed bonus is noticeable but not extreme. Most players describe it as making general movement feel smoother, especially when running between farming plots, storage, and NPCs. As the pet gets older, the speed increase usually improves slightly, but it never becomes game-breaking.

How Does the Bonus Experience Work?

One important thing to understand is that the ~500 bonus experience only applies to the Grey Mouse itself. It does not share this experience with other pets.

In general, this means the Grey Mouse levels itself faster than most pets that rely purely on standard activity-based experience. Over long play sessions, this adds up and allows the Grey Mouse to reach higher levels with less effort.

Most players who misunderstand this passive expect it to boost all pets, which leads to disappointment. In reality, its value is in self-sustainability. You do not need to actively train it as much as other pets.

Is the Grey Mouse Good for New Players?

For newer players, the Grey Mouse can be useful but not essential. The movement speed bonus helps early on, especially when maps feel large and resources are spread out. However, beginners may struggle to access Mythical Eggs early.

Usually, newer players benefit more from pets that directly affect farming output or income. That said, if a new player happens to obtain a Grey Mouse early, it can make daily gameplay feel more comfortable and less slow.

Some players compare it to browsing lists of cheap grow a garden pets, but the Grey Mouse stands apart because its value is not tied to price efficiency or early-game farming power.

Is the Grey Mouse Worth Using in Late Game?

In late-game scenarios, the Grey Mouse remains useful, but it is rarely a top-priority slot. Most players who reach late game focus on pets that boost production, rare drops, or event-related mechanics.

That said, many experienced players still keep the Grey Mouse equipped during long farming sessions. The movement speed bonus stacks well with muscle memory and optimized routes, saving small amounts of time that add up over hours.

The bonus experience also means you never have to worry about the Grey Mouse falling behind in level. It stays relevant without maintenance.

How Does Hunger Affect the Grey Mouse?

The Grey Mouse has 15,000 hunger, which is fairly standard for Legendary pets. In practice, this means you do not need to feed it constantly, but you also cannot ignore hunger entirely.

Most players feed it during routine inventory checks rather than treating it as a high-maintenance pet. Since it levels itself passively, hunger management is usually the only thing you need to watch.

What Does the Grey Mouse Look Like?

Visually, the Grey Mouse has a simple and clean design:

Gray fur

Pink inner ears

Black facial features

It does not have flashy effects or animations. Most players describe it as understated, which fits its role as a background utility pet rather than a centerpiece.

Are There Other Pets Like the Grey Mouse?

The Grey Mouse is part of a very small group of pets that gain bonus experience automatically. Other pets in this category include:

Squirrel

Brown Mouse

Starfish

Mochi Mouse

Tanuki (only when it rolls for experience)

In general, these pets are valued for convenience rather than raw strength. Players who enjoy passive progression often collect these pets specifically.

Common Mistakes Players Make With the Grey Mouse

One common mistake is expecting it to boost all pets’ experience. As mentioned earlier, the bonus experience only affects the Grey Mouse itself.

Another mistake is overvaluing it early and underusing farming-focused pets. The Grey Mouse supports gameplay but does not replace core progression tools.

Finally, some players forget that movement speed increases slightly as the pet ages. This leads to incorrect assumptions about its scaling.

Final Thoughts on the Grey Mouse

The Grey Mouse is a practical, low-maintenance Legendary pet in Grow A Garden. It rewards consistent play rather than active micromanagement. Most players who enjoy longer sessions, efficient movement, and passive leveling will find it useful.

It is not a must-have pet, but it fills a specific role well. In general, the Grey Mouse works best as a supporting pet alongside stronger farming or event-focused options.