I'm trying the girt thing as soon as possible, when I clean the waterer the water in the dogs dish is gross! And I'm fending off the chickens trying to drink before I can dump the water to refill.Another KISS idea..
Put grit into a heated dog bowl deep enough to to form a stable base and raise the waterer up to the rim level; put water in the grit to conduct heat. Place one of these 2 kinds of waterers on the bed of grit depending on which sizes you have.
Quart size heated bowl fits the chick sized water bases which cost about $2 and can be used with any regular mouth canning jar or a 5 lb honey jar which holds 1/2 gallon. This photo shows the 5 lb. honey jar (apx. 1/2 gal. water). (I used this size all last winter successfully with all age birds.)
The 5 quart larger dog bowl fits a 2 gallon waterer:
Photo by @hoosiercheetah
Hoosier Cheetah is trying this size this year and so far has kept thawed. Watching to see how it does in negative temps.