Who pinched my tea?

Having my tea - slice of bread and butter, small cake, even smaller wrapped flapjack. 
Knock at the door - probably a delivery - left three dogs in the room , Merlin came to the door with me. Not a delivery -  next door neighbour with a query. Chatted to her for 5 minutes or so ……
Surprise, surprise - my plate is empty! 
No sign of the bread and butter - or the flapjack  - but debris from the small cake on the dogs bed!  Pixie and Sprite looked guilty - Sprite actually had crumbs on his face. Obviously they didn’t like the cake much - it was a blackcurrant sundae tart - probably too sharp a taste. The flapjack was found later - still wrapped - under my chair.
You would think that by now I would know better than to leave food on a low table and dogs in the same room !!!!!!
At least they only took the food off the plate - they didn't knock the plate to the floor  - it would surely have broken as I have hard floors.