Ok, so other day I found Seeker dead which was most likely a brain haemorrage, so Beetlejuice was alone. I bought 2 new baby females 4 her and Ive had them out just now running about. I have found a lump on Beetlejuice's neck, just behind her right ear and down a little. Its like a round ball the size of a 20pence piece. Theres little red marks like shes been itching it. Shes just over a year old and never had any problems. What could it be?