In answer to your questions:
1. Boots Hayfever & Allergy Relief (Cetirizine Hydrochloride 10mg) - 1/2 tablet twice a day, for 3 days.
2. Weighs about 23kg
3. Licks (doesn't bite) and scratches with back foot.
4. Getting on for a month, on and off.
5. She doesn't get in the long grass much of it's wet weather, and it does appear to ease.