I'm talking dogs and cats, not fish and snails.
Bury them in the yard? Cremate and spread them around or put the can in a corner?
We had a pet cemetary at the family farm when I grew up, but now I seem to have various tins of ashes sitting around. I think I'll take a drive in the country and pour them out the window doing 65 since they all loved hanging out of the car at speed.