Just tried to order 40 dewormers from Jeffers and received an email that customs will restrict me to 30. I told them not to ship until they heard from me. Border Services has no restrictions on the number if for personal horses as we pay the tax as tho bo't in Canada. In the past I've ordered over a hundred from Chick's and never a problem with Customs. I would again but their price on Ivermectin was greatly increased. If you want to check anything Border Services has an 800 number.