
Do you mean the green oval shape with the spikes?
I have one which I also use for a bit of peace from the pup with some treats in it. I sometimes put her food in it, but she's likely to get bored at the moment and not finish her meal, I think she going through a phase of going off eating as she is not growing so fast and I am in the process of dropping her lunchtime meal.
I suspect in the future when she's a typical adult GR that falls on her food like she has been starved for a week, it will be very useful