Nexgard Spectra Xlarge Dog – 30.1-60kg Nexgard Spectra delivers the most complete protection from fleas, ticks, heartworm and intestinal worms available, in one monthly chew. At the end of a 3 month Australian field study, 100% of owners reported that NEXGARD SPECTRA was well received by their dog. It is easy to give with or without food, whichever is most…