Mitzi and perch

I have mentioned before about how Mitzi eats her pine nuts on a particular perch but she often tries to get nearer to me in the mistaken belief that she will get more than Monty. When she does this I tell her to go on the right perch which she does but recently she has started to try and get round it by keeping one foot on the right perch while the other foot is further forward on the perch nearer to me. I then say something such as: "put that other foot on the right perch"  or  "in the right place please" or even just "both feet please"
and she always understands what I am saying and does it. 

Jane