Shelled Walnuts are a great boredom breaker for hamsters, keeping them busy through the night while trimming their teeth! The raw version gives your little one a higher level of difficulty due to the sturdier nature of the shell.
If you'd like to try a lower difficulty boredom breaker, try the baked version here!
Human Grade. Product of USA.
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If your hamsters has difficulty breaking open the shell, you can use a nut cracker tool to slightly open it.