Thank you both so much for the info, and thank you Opaque for the compliment! I also think Ziggy is gorgeous
I'll be sure to look for weaned/fuzzy rats. I have I think 1 or 2 more adult mice left in the freezer, so when it comes time, I'll investigate getting some quails and finding something of an appropriate size for him. Thank you for also letting me know about that common behaviour. As always, I appreciate you all the very thorough answers you give c: