A deck I came up with as I was grinding out the Who Let the Dogs Out?. Many of the other deck lists I found used 5 and 6 mana beasts, but I found it difficult to get those and Tavish Stormpike on board at the same time. Most of the beasts have rush to create chains of summons, since Tavish usually dies the turn after he's played.

Mulligan for Tavish Stormpike. Lorekeeper Polkelt is there to help find Tavish, and helps preserve chains of summons for later in the game. 

K9-0tron is there to dredge when Tavish or Lorekeeper are hiding at the bottom of the deck. I was also working on You Can Pet the Dog at the time, so I used K9 to grab 1 cost minions.

At the time of posting this deck, there are only two 3 mana beasts with rush: Zixor, Apex Predator and Diving Gryphon. I opted to exclude the gryphon since I was worried about it breaking chains randomly. To help I added cards that give rush or force attacks (such as The Beast Within), but you'll need to find one of those first. 

As far as 3 cost beasts, Jungle Panther is there due to stealth (easier to set up the turn berfore you play Tavish, and Rustrot Viper is there largely due to being tradable. 

The beast generated from Tame Beast (Rank 2) costs 4 mana, so you can start pulling minions out on turn 5. 

The Azsharan Saber doesn't feel great, but it's useful to help snipe threats in the mid-game. 

You're not going to win any games with this deck, so once Tavish Stormpike dies, concede and move on. Happy grinding!