It's REALLY bothering me that it's not capitalized, too. That was the first thing I noticed, how silly and out of place and unofficial it looked. No, maybe we don't say "That animal is called an Ostrich" (or well, write. I guess we don't say capital letters e_e) in English, but the fact that EVERY other pet always has their name capitalized, combined with the fact that this pet has a stupid double consonant at the beginning of its name, makes the name 'rreign', without a capital letter, look utterly ridiculous.
That's all I have to say.
ETA: I thought I'd add some examples, heh, just to prove a point:
The Hikei is up for poll again!
Or, perhaps it truly is the sound of some unfortunate soul who has run into the Graveyard Celinox and Nightmare Terracoon.
The genteel Malticorn has bested the Archan in combat, sending it straight to the graveyard!
While the Nightmare Paralix seems very eager to make your acquaintance, the Graveyard Escalade seems to be puzzling over the effects of its recent Zombee sting.
All from the most recent news posts that mention pet names. ANNOYING.
ETA #2
Quoted from Luxe on the comments:
I am sorry that so many people are disturbed by the lowercase name, but a decision was made rather recently to discontinue capitalizing species names and colors. The rreign is the first news post of many more to come affected by this change.
Really, what a stupid change. It makes the pets look very unimportant and impersonal somehow. I know it's the smallest change, but I find it rather dumb.