The two outer Pets in this Level are fairly easy to rescue by removing blocks with the line blasters and by matches, the one in glass is more difficult!
There are two ways to break the Pet from it's glass block.
1
You can use line blasters to remove the blocks and completely remove butterfly from below it.
The glass breaks landing on the wood (as shown in the first play through in the video example)
Then use the second butterfly that falls to rescue the Pet.
2
Break the glass on the vine covered butterfly.
Then use a line blaster to remove the vines so you can use the butterfly (like in the second play through).
Either way, it is tedious filling the butterfly with so few blocks on the board, but fortunately the moves are not limited.