With a couple of line blasters that you have in Pet Rescue Saga Level 51, you must eliminate the steel containers around the animals. Keep an eye on the tools on the right side of the board, since they can help you at any time to make your life easier when you have to destroy large groups of blocks.

Pet Rescue Saga Level 51 Objectives:

The objective of Pet Rescue Saga Level 51 is to save 6 pets and get 12,000 points.

How to Beat Pet Rescue Saga Level 51:

Use the bombs that are triggered as you remove the blocks and the boosters when you cannot move the panel to advance into the stage. Just to make you life easier, save the last bomb for the last steps of Pet Rescue Saga Level 51.
You only have 6 animals and you have to save all of them. Blast big combinations of blocks to open up the possibility of using the column booster, and make the best use of it whenever is required to stop the animals on high columns from dropping off the panel.

Compared with most challenges, the holes in the panel on Pet Rescue Saga Level 51 influence the animals in a different way. Instead of the pets seated on the holes in the panel and moving to the left when the matches are removed, the animals will instead fall right to the ground. This changes things a bit, so plan your next moves according to these dynamics.

Video Walkthrough for Pet Rescue Saga Level 51:

Watch this nice tutorial in order to better understand how to beat the game with its own weapons.