NexGard Spectra Red is a monthly beef-flavoured chew for large dogs weighing 30.1-60kg, sold in packs of six. It's a broad-spectrum parasite treatment combining flea, tick, mite, heartworm and intestinal worm control in a single dose. Prescription-only in Australia — you'll need a script from your vet before purchase.

The two active ingredients are afoxolaner, which kills fleas within hours and paralysis ticks for a full month, and milbemycin oxime, which prevents heartworm and treats roundworm, hookworm and whipworm. The chew also controls demodectic and sarcoptic mange. That coverage means one monthly dose replaces a separate flea/tick treatment, heartworm tablet and intestinal wormer for most dogs — worth noting if you've been juggling three products.

Owners choose Spectra when they want one monthly job done rather than tracking multiple treatment schedules. The chew format is generally well accepted by dogs that refuse spot-ons, and the beef flavouring means most take it straight from your hand without needing to be hidden in food.