What Are They? Ice Circles!

   That's what i call them, anyway.  It's the frozen water from this bowl.
  When the weather is as cold as it has been mid January this year, it's hard to keep the pets' outside water liquid.  When we dump it for fresh, we need to go inside for the liquid, but usually leave the ice in the yard.
 

 Here are the photos from January 30th's Wordless Wednesday that i asked ya'll to submit guesses as to what they are.