when my uncle turned 70 his dog died a few days later. i asked him if he would get a new one and he said "you see, 7 goes into 70 just too many damn times. i've buried too many close friends, and i just can't go through that again." i'll never forget those words. i am a real softie for dogs (yeah, yeah benzo, for everything else too), so i feel your pain thrills.
my family lives in a rural area and we always bury our pets in the woods behind their house. there's something about blistering up your hands digging through clay and boulders to carve out a resting place for your pet that is incredibly cathartic. it's the only way i ever get over it.