Can someone tell me the name of the book where the frog eats the butterfly in the end?

[BroccoliSpears]

...or something along those lines.

They're best friends and they agree to be best friends for ever and then one eats the other.

??

[Champagneforlunch]

Dd has it, can't remeber the name it's about a tadpole and Caterpillar.

[Champagneforlunch]

Tadpole's Promise

[Linnet]

Tadpole's Promise by Jeanne willis and Tony Ross

I love that book

[BroccoliSpears]

Thank you!!