funny, my dog turned his nose up at Pedigree Chum as well, he prefered the cheaper lassie brand guess you have small children for it to end up there.
if you can see the can, why not poke a knife through it and then pull it out?.
failing that you may have to remove the toilet to dislodge it from...
You would need to remove the parts ready for collection,and then you can advertise on Ebay,but you would still need to get rid of the shell.
OR
you could sell the whole car for spare's to someone that already has one,this way, you don't have to worry about disposal
hope this helps