Possible Clues:

• Apparently embarrassed to exhibit pet picture?
• Cowed, furtive
• Shamefaced (expression)
• With a guilty look witch swallows head of newt -- and tail
• With dejected appearance
• Depend on setter to make you shamefaced!
• Wretched call to punish murderous cur?
• (Of an expression) downcast, glum
• Suspend setter for example, guilty in manner
• Put up with mean scoundrel, shamefaced