The strange case of the disappearing balloon

In the drawer in the kitchen which is the miscellaneous drawer; the one with the roll of sellotape, the biros, the shed key, strange bits of leftover plumbing, the washing machine filter key - you get the picture - in this drawer, there is a packet of balloons. Until yesterday, this was Mollie's packet of balloons, for occasional treats. She is nuts about tennis balls, but when faced with a balloon, Mollie goes psycho. You can't even blow one up in peace (as Tracy found out yesterday!).

Yesterday afternoon, Tracy decided Mollie could have a balloon, as a treat. So she picked one out (it was bright pink) , and blew it up. While she was blowing it up, Mollie tried repeatedly to grab it, which somewhat hampered the operation, but eventually the deed was done, Tracy tied a knot in the top, and out into the garden they both trotted. A couple of seconds later, there was the usual bang. But then, Tracy called me outside, where Mollie was sniffing excitedly along the fence. There followed an exchange something like this:

"She ate it."
"What, all of it"
"All but this bit" (displays knot from top of balloon)
"Wow"

So, for the next few days, we'll be carefully inspecting anything that comes out of Mollie dog to see if it's pink and rubbery. Nice. And our neighbour will too. Lets hope it emerges soon. In the meantime, as you can see from the picture above, Mollie is utterly unaware that there might be a problem. In fact, there is absolutely no outward sign that she's eaten anything abnormal at all. Yet.

If it doesn't reappear soon, I guess there'll be a visit to the V.E.T. to see what happens next. I suppose there's no need to tell him how she got hold of the balloon... ?