I have same problem with Dyson nose Lupin and grazer Ducha who is 18yrs............its also a problem cos have tried hiding the food so I can reach it from bed for Ducha but Lupin sniffs it out, although if I put a cover over it like a plate or dish, that seems to work.
However as you can tell my sleep is not very ongoing and when I get the food down and put it on corner of bed, I am falling asleep and then Dyson gets it grrrrrrrrrrrr