Not sure whatcha meant but.
There is the premium member breeding specialization that lets you have 3 extra spaces :p
You can also buy more space for 20 apples per 5 space at Realm >> barter >> apples
premium is in the apple section as well
https://wolfplaygame.com/barter.php
although i strongly suggest you just get rid of some wolves :p cheaper and more efficient.
apples cost around 1000~1500 mushrooms :p
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