Can someone please help, my 8 month old Isa Brown has a fluidy lump the size of a golf ball on right side of her breast (crop) . She is very happy, eating well, poo is good, drinking well, no strange behaviour, she is her normal nosey self. When I touch or put pressure on the lump, she does not appear to be concerned or bothered by it. Does anyone know what this is, what can I do? THANX !!!