We have a PVC pipe waterer for our birds and it seems like some of the nipples are leaking. Do you often have to change out nipples on your waterers? Or do DIY waterers only have a limited lifespan? Don't get me wrong, we built it well, but chickens are super destructive. Do you have a favorite brand of chicken nipples? P.S.: I am still a 12-year-old on the inside and can't stop giggling as I type this.