A SPECIAL PET SHOP WELCOME
Upon arrival give each guest a pair of their own animal ears.
You can make these by attaching felt ears to an inexpensive painter cap from a paint or hardware store. Enlist a teenage or adult helper to face paint a simple nose and whiskers on each child. 
Invite the children to draw and decorate a "Pet House" (large appliance box), with markers, while they are waiting for all of the guests to arrive and receive their face painting. This activity is also effective for settling the children down at the end of the party - parents will really appreciate the thought!

LITTLEST PET SHOP BIRTHDAY PARTY GAMES
Select a few easy games. After each game the children will receive Pet Shop kibble to redeem for prizes or treats such as stickers, jewelry fruit snacks etc.
Have a dog biscuit scavenger hunt. Write numbers on the bones before
  hiding, then the children will receive a prize that corresponds to the
  number on their bone.
Water bowl relay races with real pet bowls
Hopstacle Course
  Players will hop like bunnies through an obstacle course you've created  
  with pillows, tires, boxes, chairs etc.
Lilly Pad Hopping
  A favorite with Littlest Pet Shop frogs. Make fabric or felt lily pads and place
  them in a circle or randomly. Play music while the kids hop from pad to pad.
  Or they can walk around the pads and when the music stops everyone has
  to find a pad ( just like musical chairs).
Pin the tail on the puppy, tail on the cat, ears on the rabbit, wing on the
  penguin...your child can select their favorite VIP. Then enlist a talented 
  teen to draw your pet on poster board. Use "sticky-tak" and paper for the
  games pieces.
instead of Duck, Duck Goose, Play "Dog, Dog, Cat" - Frog, Frog, Turtle
  or any other variation.
Kibble Bean Bag Toss
  Provide a few bean bags and a large dog food bowl.
  The children will take turns trying to get the bean bags into the
  bowl from a designated spot.
Animal Match: Before the party print out some large pictures of Littlest Pet
  Shop VIP Animals. Cut the pictures in half. Then hide them. Each child will
  find one half of a picture. They then need to find the player who has the
  other half that matches their own.
Provide a few Littlest Pet Shop coloring books/sheets and crayons for a
   quiet activity.

A FAVORITE LITTLEST PET SHOP PARTY CRAFT

Collect empty boxes before the party ;shoe boxes, cereal boxes etc.
Provide colorful paper, sticky backed craft foam, craft foam flowers, glue sticks, scissors etc. The children can cover and decorate their very own littlest pet house to take home.

LITTLEST PET SHOP BIRTHDAY PARTY TREATS
Serve your pet shop fans lovers sandwiches cut with animal cookie cutters.
Veggies and dip, fruit chunks. Goldfish and animal crackers are
always a hit with a younger crowd!

LITTLEST PET SHOP BIRTHDAY CAKE IDEAS

Serve ice cream sundaes in new clean, plastic cat bowls.

Puppy Paw Cup Cakes
  Bake and frost cup cakes. Use candies to make your paw prints.
  We use large mint patties with small mints, like junior mint candies.

Dog Bowl Birthday Cake
  You'll need a new large dog bowl, pound cake, and pudding and cookie  
  crumbs. Cut the cake into cubes. Place some of the cubes into the bowl.
  Add a layer of pudding and then another layer of cake cubes then pudding
  again. Tops with cookie crumbs. Use long thin party candles when it's
  time to serve. Serve in small dog bowls.