Your dogs have tapeworms. Ivomec and Safeguard won't kill them. Zimectrin gold or anything else with praziquantel in it will get rid of them. Equimax will kill them but if you use it be careful because it's easy to overdose a dog with equimax.. The zimectrin gold is what I use..
X2... the Equimax works great for tapes, just give them a little dab on your finger about the size of a peanut m&m.