had letter of my vet this morning saying blue was due for his 3monthly worming ..i thought they had to be wormed every month and have been doing so since iv had blue .only done ollie once as not had him that long but ther due to be wormed next week by my monthly dates .my vets should know ther being done monthly as i buy ther worming tabs from the vets :blink: so what i need to know is are they supposed to be done monthly or every 3mths :thumbsup: