If I ask my neighbor to feed my pets when I'm away, how should I compensate her?

I am going to be away for about 5 or 6 days. I asked my neighbor, who lives about 4 houses away, if she could feed my pets. I have 3 cats, 2 frogs in a fish tank and a Siamese Fighting fish in another tank. It would involve coming over once every day or maybe every two days to feed them.

What should I do to compensate her? Should I offer her money? How much would be a good amount? Should I buy her a nice gift? Both money and a souvenir? I have no problem asking her what she would like but I don’t want her to feel awkward.