Thanks to everyone who contributed such a wealth of clues this week. The final tally is:
SW#19, BBM2 have 1 vote
FJ#21, peterm #27 have 2 votes
We now have a winning troika with 3 votes each of tyke51#15, SW#18 and kt17#28.
I really like all 3, but with commiserations to tyke and kt, I'll go with SW's succinct
Pet's a different size
Congratulations, SW. Here is your prize
https://www.youtube.com/watch?v=3e8Qjy7VHnU
Cheers