I have just bought one single dose of Advocate for my dog and it cost me £12.76.   I usually get the nurse to do it for me and I thought that price included her charge.  It seems to me she doesn't charge for her services.  I used to be able to buy a 6 pack for £23.96.   Do you pay less?

Depends on the size/weight dog but even adding in a charge for prescription this

http://www.vet-medic.com/flea-treatments-c91/bayer-advocate-spot-on-flea-and-wormer-treatment-prescription-required-p8744

is a lot less. most of other on line prices are similar

Thank you tatty-ead for taking the trouble to find this for me.   Brilliant.