hi there! my brie does that sometimes too - but i started noticing a pattern. she would start licking things, particularly metal things like chair legs and stuff, when she was having an upset tummy. usually now i notice that her little tummy is gurgling somewhat when she starts to lick things. and then sometimes she will have diarrhea but sometimes not. ordinarily she does not lick things like that, just during these times. i'm not sure why though, it's strange.