The deer, rabbits, earwigs, slugs/snails attacked my irises in Winter/ early Spring. There was nothing "green" for them to eat, because the hills were still dry and brown. So they helped themselves to the new iris growth. The squirrels keep digging them up, but yes they just leave the rhizome(s) there. I also have a flock of wild turkey digging up my irises and laying in the beds!
They do help keep the earwigs in check, I just wish they didn't dig up the irises, then lay on them.
No senior moment here, I did plant them in late May, early June. Plus, I'm not a senior...yet.
The wire loop I use to hold them in place until they grow some roots is still there, pulled up out of the ground, but still there. I don't have a dog anymore... no children around. I'm next to open space and I get a constant visit of wild critters.