Hello, Amelia Philipow-Gillette.
Welcome to Microsoft Community!
Your bunny seems a bit naughty.
And based on your description, it appears that the access port on one side of your partner's Surface Pro charger has been chewed up. For that part of the damage, unfortunately there is no direct accessory available from Surface Hardware Services that can be used as a replacement.
We may need to replace the charger with a new one that can support the Surface Pro, allow me to share the following with you:
Buy Microsoft Surface 65W Power Supply - Microsoft Store
Buy Microsoft Surface 127W Power Supply – Microsoft Surface
We can choose the right charger according to the specific model of Surface Pro.
We can charge Surface through USB-C port for the time being.
Thank you and your partner for understanding and supporting Surface products.
I wish you all the best.
Best Regards.
Leo.L - Microsoft Community Support Specialist