cat sitter etiquette

[jeanswithatwist]

out of interest, is there an unspoken etiquette for a cat sitter ie on top of their daily fee, do you give them a tip or something?

I suspect that if it was a reasonable fee and they'd done well by the cat, I'd probably give them a bottle of wine or something. (Labelled ' From [the cat]') I don't think there's any form on it.

ta