They CAN understand.
And YES, it's possible for your animal to be trans. Your pet having a penis does not make it "male". It's animal abuse to misgender your animals.
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Edited by The Fiddler: 4/14/2017 12:00:26 AMI put peanut butter on my balls so my dog can lick it off. ( ͡° ͜ʖ ͡°)