So sorry to hear about Nugget. It sounds as it Nugget passed quickly and thank goodness, you didn't have to be the one to make "the decision." We've had to do that twice and it's incredibly difficult.
For Agnes and Maud, we got them each an 'angel" (yard ornaments) for the front yard. Their ashes are next to our bed, along with their collars and a photo of them. On the living room mantel, we have pictures of them and a memorial candle.
When I die, my DH is going to mix my ashes w/Agnes' and toss us into the ocean together (Caribbean - in my will, he's instructed to take a vacation there to take care of this).

