Unlock the extra moves by winning Doggy Doo games:
Effect - Action
Sit down - Press Down.
Lie down - Press Down while sitting down.
Sit up - Press Up while lying down.
Stand up - Press Up while sitting down.
Shake body - Press Left, Right, Left.
Beg #1 - Press Left, Right, Up.
Beg #2 - Press Right, Down, Up.
Beg #3 - Press Left, Up, Down.
Beg #4 - Press Left, Left, Right.
Beg #5 - Press Left, Down, Up.
Poop - Press Left, Right, Down.
Pee left - Press Left, Down, Left.
Pee right - Press Right, Down, Right.
Never Hungry
When walking around you will see crates every now and again. If you smash into these by running into them food will come out. Eat this and you won't be hungry.
Regain Health
Use one of the beg moves near a human and they might give you a treat.
Different collars
When Jake bathes, he also gets a new collar, and a new J to match it.
Free food
In some areas there is a slot machine called "Lucky 7". Have Jake pull the handle. If the rows match up, Jake will get some food. If it lands on all "7"s, he gets a bunch of food.
Treats from animals
To get a free treatm grab an animal (chicken, cat, or skunk). A treat will fall from it. Press Square and Jake will shake most of the feathers or fur off it. If you grab a skunk, press Circle hard. Jake will pitch him in the air. Giving you time to bolt without being sprayed.
Boom City Station: Sleeping Bandit
You will need the police dog. First, have Jake go up to where the warehouse is located. Jump on the first platform, then on a crate and push the button. Then, get the German Shepherd and have him climb up on the roof and take the jumps. Once inside, have him grab the big "blocks" and pull them out in a line, then down. The opening across from the entrance has a bone. To save time you can have the German Shepherd get it and toss it down. The middle one leads to the bandit, and the other one is a dead end. Once in the middle one (with the German Shepherd), run down the ledge/path. Once in the warehouse, walk slowly (no barking) down the ramp and around the path and down again. Have the German Shepherd pull the lock on the door, then run back up underneath the bandit. The "Pick Up" option should be available. Have him grab the mask, and he will automatically take it back to the cop.
Boom City: Finale
To save Daisy, have Jake run down the first ramp and push the button. Then, back up the ramp and around the path. Down the next ramp are two buttons to push. Back up the ramp and go around the path then down another ramp. Pull the lever and follow the arrow up the next ramp across the round object and down. Pull on that lever, then run over to the crates. Hop up them and back down onto another ramp/path. Go past the turn slightly and push that button. Then, go back and down the path across another round object down another ramp. You will see a U-turn sort of arrow on the ground. Turn around and run past the crate of cat food. There is another button just past that which is easy to miss. Then, keep going forward and up yet another ramp. Follow the path around all the bends until you get to a square area, a big machine, and a small pile of wrenches/screwdrivers. Have Jake toss three of these into the machine and it will break.
Boom City: High Street helicopter
Have the Husky run up the steps by the mall. (where the bath is) and up and across the roof and down onto the platform the get the helicopter.
Boom City: Second thief
Once you get the Greyhound, run under the man and bark non stop. You will hear him saying things such as "Nice doggie" and "Hush now". That indicates that he is following you. Walk around the bottom slowly, barking non-stop. Once you get him all the way to the end, run around the corner (keep going forward); then around the corner, up the steps, around the next corner, and grab the bag. Once he has it, he will take it to the cop.
Centre (Clarksville): Getting the bone in the butcher shop
Take the kids basket someplace where there are chickens and have Jake bark at them. Then, carefully pick them up. When Jake is directly next to the basket, gently tap Circle so that he will drop them in. If you press Circle to hard, he will
pitch them and they will break. Then, take the basket to the kids. Once you regain control of Jake run into the shop, you can also get something to eat while in there.
Mountain Top: Fix antenna
To fix the antenna at the mountain top, take that pigeon feeder off the mall landing on High Street. Toss it close to the antenna on Mountain Top.
Ski Slope: Snowball fight
When the kid tells you to throw snowballs at him, go into Smellovision after picking up a snowball. Back away from him a few steps, aim for his chest, and throw. A sound will indicate when you have hit him correctly. After the third one, he will drop the bone. Once you are doing it correctly, the kids will throw snowballs at Jake.
Ski Slope: Snowman parts
The coal is in the house/shack up there by the snowman. The arms are in the trees north of the snowman. The nose (carrot) is in a trash can next to the ski lift where the people come out. The hat is on the decking of the cafe up the stairs where the ski lift is located.