Puppies

Rangers can breed their canines to produce litters of puppies.

A puppy starts life with its coat colour already set (e.g., "A cream puppy"). When tamed by a ranger, it bonds instantly. Rangers can 'compare' puppies and other canines to each other in order to assess their traits. Traits include brutality, toughness, energy, might, procreation, and targeting.

The puppies world storm and some subsequent shouts:

The ground begins to rumble beneath you.
You hear some high-pitched, tentative barks, followed by the scrabbling of
excited young paws across a wooden floor.
You hear Graddam exclaim, with a note of surprise: Why hello, little friends!
There is a tremulous howl of response as the animal healer bends down to
examine the new arrivals, making note of their different characteristics.
BeasT shouts: woot
It seems something has brought a new energy and friskiness to the world's
     canines, which, with time, will also bring... puppies.
Butters shouts: OMG PUPPIES
The rumbling fades away.
You feel the world has gotten cuter.
BeasT shouts: woof
NEWT shouts: i knew this winter was unseasonably warm, but i was not expecting
     spring
Primordial shouts: Graddam says: If you have the patience and are up for the
     challenge, breeding to enhance certain qualities in pets might be very
     rewarding... (Rangers may wanna pay a visit to him to find out more
     info)