I have raised a female hystrix for last 12-13 years and the last week she has stopped eating ..prior to that month or so, she started eatingless frequently ... now, . there’s a “bump” between her eyes and the front of her nose, seems swollen as does the rest of her body....she’s lethargic and just rests under a log in the corner of the aquarium ....could this be the natural end of her life? She’s in a 240, ph 7.0, ammonia-0, nitrite 0, nitrate, 20-30..... weekly large water changes since I got her as a pup...... thoughts?