ceramic

[CJPARSONS80]

Hi, this is just a general question, I am pretty sure how to stop it but anyway....For the last 2 and a half years Oscar had been using a large blue plastic feeding bowl, when we got Mocha we bought her a little stainless steel bowl and they instinctively knew that each owned their own bowl and whatever food was in those bowls wasn't to be shared.
It looked horrible having a pretty exspensive steel bowl next to a cheap plastic bowl so when a paint your own pottery place opened my boyfriend made Oscar a nice ceramic bowl with pretty colors and his name...still blue on the inside in case he got confused!!!
Now Mocha thinks that her bowl is hers only but that his bowl is communal....now we also have a ceramic treat cannister that is of course both of theirs and I painstakingly taught them one week that if I take the lid off they can reach in and take ONE treat each which they learned very well. I am wondering if maybe since the bowl and treat jar are both ceramic could Mocha be confusing them and think she can eat out of his bowl?