This is less an answer of Do we want a Daily Pet, as the chat users are creating one anyway.
This shows how to link and pin the Daily Pet.
Hover the mouse over the drop down arrow at the top left of the image.
Right click the mouse over the drop down arrow.
Select Copy Link Address
Add link as comment
Then add the link to the chat room via a message. Using the format
[Daily Pet yyyy-mm-dd](the copied link address). Leave no spaces between the  and (). The chat has bumped the link onto the next line.
Only Room owners or moderators can pin the messages.
If you are not a room owner or moderator, @ping someone who is, to pin the Daily Pet message. Try and find someone who has been recently active.
Click on the drop down arrow for the message and select pin this message.
Unpin the previous Daily Pet
Go to the drop down arrow to the right of the pinned message. Select unpin this item.