TEXT: Mildly Dangerous Petting Zoo: A
  Compendium of Really Low CR
  These cute critters may not be able to hold their own in
  battle, but there's no doubt about how delightful they are. Use
  them as familiars, companions, and friends, or sprinkle them
  in your world to add a little bit of charm.
  Petting Zoo by Challenge Rating
  Challenge 0 (10 XP)
  Baby seal
  Goose
  Impala
  Challenge 1/8 (25 XP)
  Giant crow
  Turkey
  Challenge 1/4 (50 XP)
  Bearhound
  Ember lizard
  Griffon hatchling
  Halberd sheep
  Juvenile bulette
  Sandstone scorpion
  Secretary bird
  War dog
  Challenge 1/2 (100 XP)
  Heck hound
  Rough ox
  Most of the Challenge 1/4 creatures are designed to be
  used as Ranger animal companions, but they can also add
  interest to combat encounters. The Challenge 0 animals are
  intended to be used with the Find Familiar spell.
  Mildly Dangerous Pet Shop
  Many of the animals in this document are common finds at
  marketplaces and shops. They can be purchased for the
  following prices:
  Animals
  Item
  Cost
  Speed
  Carrying Capacity
  Bearhound
  40 gp
  40 ft.
  150 lb.
  Goose
  3 cp
  30 ft.
  -
  Halberd sheep
  75 gp
  30 ft.
  250 lb.
  Heck hound1
  200 gp
  40 ft.
  -
  Rough ox
  100 gp
  30 ft.
  700 lb.
  Turkey
  5 cp
  30 ft.
  -
  War dog2
  100 gp
  40 ft.
  125 lb.
  1 Heck hounds can only be found for sale from less
  scrupulous sources.
  2 Without its barding, a war dog costs 60 gp and has an AC
  of 12.
  The other creatures in the document must come from a
  very special exotic animal vendor, or be captured in the wild.
  The Petting Zoo
  Baby Seal
  Small beast, unaligned
  Armor Class 11 (natural armor)
  Hit Points 4 (1d6 + 1)
  Speed 15 ft., swim 40 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  12 (+1) 8 (-1) 12 (+1) 3 (-4) 12 (+1)
  6 (-2)
  Senses passive Perception 11
  Languages —
  Challenge 0 (10 XP)
  Hold Breath. The seal can hold its breath for 15
  minutes.
  Actions
  Bite. Melee Weapon Attack: +3 to hit, reach 5 ft.,
  one target. Hit: 4 (1d6 + 1) piercing damage.
  The baby seal might be adorable, and fuzzy, and
  clumsy, and floppy, and velvety, and chubby, but it
  won't hesitate to bite you if provoked.
  
  Bearhound
  Medium beast, unaligned
  Armor Class 12
  Hit Points 13 (2d8 + 4)
  Speed 40 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  14 (+2) 14 (+2) 14 (+2) 3 (-4) 12 (+1) 7 (-2)
  Saving Throws Wis +3
  Skills Perception +3
  Senses passive Perception 13
  Languages —
  Challenge 1/4 (50 XP)
  Keen Hearing and Smell. The bearhound has
  advantage on Wisdom (Perception) checks that rely
  on hearing or smell.
  Ursine Hunter. The bearhound has advantage on
  attacks made against bears.
  Actions
  Bite. Melee Weapon Attack: +4 to hit, reach 5 ft.,
  one target. Hit: 7 (2d4 + 2) piercing damage. If the
  target is a creature, it must succeed on a DC 12
  Strength saving throw or be knocked prone.
  Bearhounds are prized for their ferocity and loyalty
  as hunting dogs. They were specially bred to hunt
  bears and other enormous beasts, and thus know
  no fear.
  Ember Lizard
  Medium beast, unaligned
  Armor Class 12 (natural armor)
  Hit Points 11(2d8 + 2)
  Speed 30 ft., climb 30 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  13 (+1) 12 (+1) 13 (+1) 2 (-4) 10 (+0) 5 (-3)
  Damage Vulnerabilities cold
  Damage Immunities fire
  Senses darkvision 30 ft., passive Perception 10
  Challenge 1/4 (50 XP)
  Spider Climb. The lizard can climb difficult surfaces,
  including upside down on ceilings, without needing
  to make an ability check.
  Actions
  Bite. Melee Weapon Attack: +3 to hit, reach 5 ft.,
  one target. Hit: 3 (1d4 + 1) piercing damage plus 2
  (1d4) fire damage.
  The ember lizard is a peculiar desert reptile with
  burning-hot scales. Despite this fearsome trait,
  ember lizards are usually solitary and timid rather
  than aggressive. Some eccentric collectors keep
  the lizards as pets.
  
  Giant Crow
  Small beast, unaligned
  Armor Class 12
  Hit Points 7 (2d6)
  Speed 10 ft., fly 40 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  5 (-3) 14 (+2)
  10 (+0) 4 (-3) 14 (+2)
  6 (-2)
  Senses passive Perception 12
  Languages —
  Challenge 1/8 (25 XP)
  Mimicry. The crow can mimic simple sounds it has
  heard, such as a person whispering, a baby crying,
  or an animal chittering. A creature that hears the
  sounds can tell they are imitations with a
  successful DC 10 Wisdom (Insight) check.
  Actions
  Beak. Melee Weapon Attack: +4 to hit, reach 5 ft.,
  one target. Hit: 4 (1d4 + 2) piercing damage.
  Shamans often have giant crows as familiars or
  companions, but cultures disagree about what the
  animal symbolizes. Some view the clever bird as a
  symbol of insight and cunning, while others see it
  as an omen of death.
  Goose
  Small beast, unaligned
  Armor Class 10
  Hit Points 3 (1d6)
  Speed 30 ft., fly 30 ft., swim 20 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  6 (-2) 10 (+0)
  11 (+0) 3 (-4) 12 (+1)
  3 (-4)
  Senses passive Perception 11
  Languages —
  Challenge 0 (10 XP)
  Actions
  Beak. Melee Weapon Attack: +2 to hit, reach 5 ft.,
  one target. Hit: 3 (1d6) piercing damage.
  Honk. The goose honks loundly at a target within
  30 ft. If the target can hear the goose, the target is
  deafened and has advantage on attacks against the
  goose until the end of the goose's next turn.
  The goose is an ornery waterfowl that likes to travel
  in flocks. It is perhaps most well-known for its loud
  and distinctive cry.
  Griffon Hatchling
  Small monstrosity, unaligned
  Armor Class 11
  Hit Points 9 (2d6 + 2)
  Speed 30 ft., fly 30 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  14 (+2) 12 (+1) 13 (+1) 3 (-4) 12 (+1) 6 (-2)
  Skills Perception +3
  Senses darkvision 30 ft., passive Perception 13
  Languages —
  Challenge 1/4 (50 XP)
  Keen Sight and Smell. The griffon has advantage on
  Wisdom (Perception) checks that rely on sight or
  smell.
  Actions
  Claws. Melee Weapon Attack: +4 to hit, reach 5 ft.,
  one target. Hit: 7 (2d4 + 2) slashing damage.
  Small, cute, and only slightly deadly, griffon
  hatchlings are a prized commodity. Many exotic
  game hunters target griffons simply to be able to
  raid their nests.
  
   
  Halberd Sheep
  Medium beast, unaligned
  Armor Class 13 (natural armor)
  Hit Points 13 (2d8 + 4)
  Speed 30 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  12 (+1) 11 (+0) 14 (+2) 3 (-4) 10 (+0) 4 (-3)
  Damage Resistances cold
  Senses passive Perception 10
  Languages —
  Challenge 1/4 (50 XP)
  Sure-Footed. The sheep has advantage on Strength
  and Dexterity saving throws made against effects
  that would knock it prone.
  Trampling Charge. If the sheep moves at least 20
  feet straight toward a creature and then hits it with
  a gore attack on the same turn, that target must
  succeed on a DC 11 Strength saving throw or be
  knocked prone.
  Actions
  Gore. Melee Weapon Attack: +3 to hit, reach 5 ft.,
  one target. Hit: 4 (1d6 + 1) piercing damage.
  The halberd sheep is a cold-weather ovine with
  thick wool and six fearsome horns. Rams use their
  un-curved pair of horns as their weapon of choice,
  goring anyone so unfortunate as to provoke them.
  Heck Hound
  Medium fiend, neutral evil
  Armor Class 14 (natural armor)
  Hit Points 19(3d8 + 6)
  Speed 40 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  15 (+2) 12 (+1) 14 (+2) 6 (-2) 13 (+1) 6 (-2)
  Skills Perception +3
  Damage Immunities fire
  Senses darkvision 30 ft., passive Perception 13
  Languages —
  Challenge 1/2 (100 XP)
  Keen Hearing and Smell. The heck hound has
  advantage on Wisdom (Perception) checks that rely
  on hearing or smell.
  Pack Tactics. The heck hound has advantage on an
  attack roll against a creature if at least one of the
  hound's allies is within 5 ft. of the creature and the
  ally isn't incapacitated.
  Actions
  Bite. Melee Weapon Attack: +4 to hit, reach 5 ft.,
  one target. Hit: 5 (1d6 + 2) piercing damage plus 3
  (1d6) fire damage.
  A product of an extremely unfortunate attempt at
  domestication, the heck hound is less destructive
  than its hell hound ancestors, but twice as
  mischevious. It's infamous for perfectly aggravating
  behaviours like incinerating the neighbor's cat and
  chewing holes through slippers and ankles. Anyone
  foolish enough to pick a heck hound as a pet
  probably deserves what's coming to them.
  
  Impala
  Medium beast, unaligned
  Armor Class 13
  Hit Points 4 (1d8)
  Speed 50 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  11 (+0) 16 (+3) 11 (+0) 2 (-4) 12 (+1) 6 (-2)
  Senses passive Perception 11
  Languages —
  Challenge 0 (10 XP)
  Running Leap. With a 10-foot running start, the
  impala can long jump up to 30 feet and high jump
  up to 10 feet.
  Actions
  Horn. Melee Weapon Attack: +2 to hit, reach 5 ft.,
  one target. Hit: 3 (1d6) piercing damage.
  Impalas are graceful antelopes that are excellent at
  sprinting and jumping, but are slightly skittish.
  Halflings and other Small humanoids ride them as
  mounts.
  Juvenile Bulette
  Medium monstrosity, unaligned
  Armor Class 13 (natural armor)
  Hit Points 11 (2d8 + 2)
  Speed 30 ft., burrow 30 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  14 (+2) 10 (+0) 13 (+1) 1 (-5) 10 (+0) 4 (-3)
  Skills Perception +2
  Senses darkvision 30 ft., tremorsense 30 ft., passive
  Perception 12
  Languages —
  Challenge 1/4 (50 XP)
  Actions
  Bite. Melee Weapon Attack: +4 to hit, reach 5 ft.,
  one target. Hit: 6 (1d8 + 2) piercing damage.
  Bulettes, which make tigers and grizzlies look like
  tabby kittens and teddy bears, make for powerful
  and invaluable companions. Nonetheless, very few
  have managed to befriend one without being
  crushed or disemboweled. Those who have been
  successful claim you need to tame the beast from a
  very young age.
  Rough Ox
  Large beast, unaligned
  Armor Class 13 (natural armor)
  Hit Points 25 (3d10 + 9)
  Speed 30 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  16 (+3) 10 (+0) 16 (+3) 2 (-4) 12 (+1) 4 (-3)
  Senses passive Perception 11
  Damage Resistances cold
  Languages —
  Challenge 1/2 (100 XP)
  Beast of Burden. The ox is considered to be a Huge
  animal for the purpose of determining its carrying
  capacity.
  Actions
  Hooves. Melee Weapon Attack: +5 to hit, reach 5
  ft., one target. Hit: 10 (2d6 + 3) bludgeoning
  damage.
  The rough ox is a massive, sturdy bovid that thrives
  in colder climates. Its incredible stamina and docile
  nature makes it an ideal pack animal, but many
  cultures also use them as terrifying mounts in war.
  
  Sandstone Scorpion
  Small beast, unaligned
  Armor Class 14 (natural armor)
  Hit Points 9(2d6 + 2)
  Speed 30 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  13 (+1) 11 (+0)
  13 (+1) 1 (-5) 9 (-1) 3 (-4)
  Senses blindsight 30 ft., passive Perception 9
  Languages —
  Challenge 1/4 (50 XP)
  Actions
  Sting. Melee Weapon Attack: +3 to hit, reach 5 ft.,
  one target. Hit: 3 (1d4 + 1) piercing damage, and
  the target must make a DC 11 Constitution saving
  throw, taking 5 (2d4) poison damage on a failed
  save, or half as much damage on a successful one.
  The sandstone scorpion is a dust-colored arachnid
  with tough skin and a long, fearsome stinger. It
  rarely hunts humanoids for food, but it is fiercely
  defensive of its territory and will attack if it feels
  threatened.
  Secretary Bird
  Medium beast, unaligned
  Armor Class 12
  Hit Points 11 (2d8 + 2)
  Speed 30 ft., fly 30 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  5 (-3) 14 (+2)
  12 (+1) 4 (-3) 14 (+2)
  6 (-2)
  Senses passive Perception 12
  Languages —
  Challenge 1/4 (50 XP)
  Keen Sight. The secretary bird has advantage on
  Wisdom (Perception) checks that rely on sight.
  Actions
  Talons. Melee Weapon Attack: +4 to hit, reach 5 ft.,
  one target. Hit: 7 (2d4 + 2) slashing damage.
  The secretary bird is a tall, black and white raptor
  with a distinctive crest of long feathers. Unlike
  other birds of prey, it prefers to hunt on the
  ground, using its fearsome talons instead of its
  beak.
  Turkey
  Medium beast, unaligned
  Armor Class 11
  Hit Points 11 (2d8 + 2)
  Speed 30 ft., fly 20 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  6 (-2) 12 (+1)
  12 (+1) 3 (-4) 12 (+1)
  4 (-3)
  Senses passive Perception 11
  Languages —
  Challenge 1/8 (25 XP)
  Keen Sight. The turkey has advantage on Wisdom
  (Perception) checks that rely on sight.
  Actions
  Beak. Melee Weapon Attack: +3 to hit, reach 5 ft.,
  one target. Hit: 4 (1d6 + 1) piercing damage.
  Turkeys are an incredibly delicious fowl, and are
  most often served roasted or fried. They are usually
  paired with a savory brown sauce or a selection of
  tart fruits. Turkeys are versatile and nearly
  universally loved, as they offer copious amounts of
  nutritious white meat and succulent dark meat.
  
  Credits
  All images found on Deviantart unless otherwise specified
  Page 1: Baby Harp Seal by Mellodee
  Page 2: Lizard Study Fin by Tsabo6, My homeland by
  WolfRoad
  Page 3: Small Griffin by sandara
  Page 4: Sheepshoop by Autumnbirds, My Puppy !! by
  NariiKemono
  Page 5: Snow mountain of big yak by ZERG118
  Page 6: Secretary bird by Faezza
  Page 7: War hound from Heroes of Camelot game
  Special thanks to u/Othesemo for endless advice and
  editing help.
  War Dog
  Medium beast, unaligned
  Armor Class 13 (leather barding)
  Hit Points 11(2d8 + 2)
  Speed 40 ft.
  STR
  DEX
  CON
  INT
  WIS
  CHA
  14 (+2) 14 (+2) 12 (+1) 3 (-4) 12 (+1) 7 (-2)
  Skills Perception +3
  Senses passive Perception 13
  Languages —
  Challenge 1/4 (50 XP)
  Keen Hearing and Smell. The dog has advantage on
  Wisdom (Perception) checks that rely on hearing or
  smell.
  Brave. The dog has advantage on saving throws
  against being frightened.
  Actions
  Bite. Melee Weapon Attack: +4 to hit, reach 5 ft.,
  one target. Hit: 7 (2d4 + 2) piercing damage, and
  the target is grappled (escape DC 12). If the target
  is a humanoid, it loses the use of one of its arms
  until the grapple ends.
  War dogs are meticulously trained by expert
  breeders and typically fitted with leather barding. A
  good war dog is fiercely loyal to its handler, and will
  not hesitate to destroy anyone who attacks them.
  
SOURCE: textdata/thevault/Dungeons & Dragons [multi]/5th Edition (5e)/3rd Party/Homebrew/Mildly Dangerous Petting Zoo.pdf