The Puppies! 4/16/09 1.00 - Big revision! RL-3 is similar, but with a smaller amount of HP that ends up at about 13,000. Fallout 3 continues the canine love, with Dogmeat.
Like Dogmeat and RL-3 before him, Charon is a non-human companion.
Dogmeat is found south of the minefield, a location you go for The Wasteland Survival Guide. Later at higher levels he will end up with a very large amount of HP and raely die in fights. That pup can be added as a companion either by finding Dogmeat's pup at the location of his death or by waiting a day or two and returning to Vault 101 entrance. Example, sometimes deathclaws can spawn around Vault 101 and kill Dogmeat if you're in the radius where deathclaws and other enemies would spawn near Vault 101.
With the Puppies! How will this mod fix the problem? Dogmeat's puppy is much tougher than the original Dogmeat.