My youngest girl, Flea, has taken to pestering the older one, Girly. She is at it non-stop. If Girly enters a room, Flea narrows her eyes and storms at her. Girly normally runs off. There are seldom serious skirmishes, but Flea just chases and chases and chases and will not leave Girly alone. I eventually help Girly escape by distracting Flea so that Girly can find a safe place to lie up. Flea then spends hours looking for Girly until she finds her and the pestering starts from scratch. I even caught Flea pestering Girly while she was using the toilet, which is a no-no in this household. I am worried Girly will start developing toileting issues. Is there anything that can be done about this? We also have a neutered male, Nunu, who generally keeps to himself, but gets on quite well with Flea. Is Flea jealous perhaps? (Girly is my husband's darling). We have a feliway diffuser on 24/7.

how old is the little un?if its playfight - not territorial, i find tiring them out with lasers works!