There is a dedicated Assistance Animal Relief that provides toilet and watering facilities in the terminal. It is located in Departures, in the amenity area approximately 30 metres past security screening.
Visual description of the Assistance Animal relief facility
As you enter the room the basin will be on your left followed by a hand dryer, rubbish bin and bag dispenser. Beneath the bag dispenser there is a dog bowl for water. There is a turfed toileting space ahead of you with a tap on the left-hand side.