We are in the southern US states for 3 months and so my dog is on Sentinel for heartworm, as I hear it is a problem. A friend of mine has told me about Bravecto for use against fleas and ticks but I want to know if it can be taken at the same time as Sentinel? They are for different reasons but I do not want to over medicate! I would prefer not to give anything but I have a Golden Retriever who gets into everything!