Gosh, WW!

Thanks for that wealth of information - I shall save it, because it is nicely condensed. I did learn about that lot when I was in my mid-teens. Not at school, but as a hobby that involved frequent visits to London Zoo to take photographs. It was a bit depressing to see how much I had forgotten - including that prairie dogs did not eat other critters! I was putting them in with weasels and stoats (mustelidae). Haven't been to a zoo, per se, for years and years. Think I would find them depressing places now for all but the smallest animals, and even then...I remember the hamsters my girls had; always looking for a way out of the cage, and then out of the room, and then out of the house.