There are several mammals that are actually venomous. Several species of shrews, Solenodon and the Platypus are all venomous. While the platypus is the largest of these, it uses it in self defense and really isn’t that big. Shrews on the other hand are voracious predators that use venom injected via grooved teeth to incapacitate larger prey, with some species even using it paralyze prey like earthworms for days in larder dens like a mousy Shelob.

So my question is can you get a large (+30 pounds or +13 Kilograms) venomous mammal? My idea is a swift predator that will bite its prey on the leg and run away quickly to let the venom to take affect before it returns to either eat its prey there or drag it back to its lair, possibly still alive.

Is it implausible for there to be a canid sized venomous predator?

There are several mammals that are actually venomous. Several species of shrews, Solenodon and the Platypus are all venomous. While the platypus is the largest of these, it uses it in self defense and really isn’t that big. Shrews on the other hand are voracious predators that use venom injected via grooved teeth to incapacitate larger prey, with some species even using it paralyze prey like earthworms for days in larder dens like a mousy Shelob.

So my question is can you get a large (+30 pounds or +13 Kilograms) venomous mammal? My idea is a swift predator that will bite its prey on the leg and run away quickly to let the venom to take affect before it returns to either eat its prey there or drag it back to its lair, possibly still alive.

Is it implausible for there to be a canid sized venomous predator?