this is all i can say.....you purchased her from a pet store (which you already know is against most peoples ethics due to that they most likely came from a puppymill) this is probably the reason for the poor pedigree. their might have been mixes and poor breeding that is why they are not registered.
females tend to be more territorial so you are going to have to be extra careful with the puppy around. fights could start. don't leave the puppy alone for one second or she could get hurt.
some people here use revolution but i only use advantix.
since you have the other two dogs, i would use the same flea medicine you use on them and the same heartguard medicine as well.
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