I may be off on this, but for
US (my wife and I) we changed things up with Ruby. New bowls, collars, leashes, pads, toys, routines, everything. We tried to make it as 'new' as we could, without being TOO new, if that makes any sense? Believe you me, we are 150% into our dogs- not having kids has made them take over that role more than most. Things like Ruby is now allowed on the couches downstairs by the TV with me, whereas that has NEVER been allowed with any dog. Little things like that.
As far as the ashes go... it helps. Hell, I even made a little 'shrine' with them along with a digital photo frame that has nothing but their pics showing. I spread a little of their ashes here and there, places they loved like my raspberry bushes and sisters yard in Homer, to help keep them close. It's not uncommon for me to put a chair in either place and sit with a cigar and reminisce.
it's tough... I'm a big softie when it comes to my animals (no surprise to anyone that knows me) whereas with people I'm a hardass. Just don't do anything too soon. You'll know when it's right. I waited over 4 years to spread my girl Amber's ashes, and I'm glad I waited. It felt so much more special when I did it. And even though it's been 5 years today, it still hurts. But the hurt has faded
slightly into fond memories. I made a
memorial video for Amber that I can now watch, but
Porter's I cannot... it's too soon, not having been a year yet.