How do i mass move??? i thought it would be self explanatory but apparently not

>Click the "Enable Mass Move" button in the top right corner of the stable, just above the tabs

In no particular order
>select all the pets in that stable (from any tabs, but cannot swap to different stable) you want to move
>select which stable+stable tab you want to move them to using the dropdowns that clicking the "Enable mass move" button made appear at the top of the stable

then
>hit the "Mass Move" button which is at the top left

Pets will be moved to the first available spaces in the stable/tab that was chosen (if the tab selected is full, they will be put in the first available slots in the next tab (if there is no space in the tab you select or the ones after it in that stable, it will not be moved (rather than going into a tab of a lower number than the one you selected- it can only go into one of a higher number) (visually though it will vanish until the page is reloaded, gonna go bug report that to Krin)

If the stable selected is full, you will get a popup saying the pets cannot be moved, as you were trying to move X amount of pets but there were Y amount of spaces left in that stable