Most Definitely the CLUE that they are not happy together. Balls don't like company. Them laying on each other is a sign of dominance. There is really no reason to House two balls together except for breeding. And if you inexperience enough to not realize what the signs of dominance or stress related avoidance then you should t be doing in the first place. My personal preference on the subject is just don't house more than one ball together.
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