So at lunch and at dinner Lola showed aggression with Lucy! I have a iris white pen I put Lucy in while she eats and I feed them at the same time. The problem is that I use measuring cups as scoops to get out the food and I measure it out. At lunch today I had one of those scoops in my hand and I bent over to bed lucy on the way to the food and Lola tried biting her head. I corrected that issue then tonight for dinner i was in the pantry scooping out food and next thing I know Lola is biting Lucy and she is crying and running to hide. I have never seen this between them and they get along perfectly and play all day its only when it has to do with food. Is this normal and how to I stop it?