hey there Rachael

Why don't you try a big handful of Bicarb Soda and 2-3drops of good lavendar oil in Milo's bath - the Bicarb will soften the water - i know that sounds funny but you will know what i mean when you try it - it also helps to heal wounds and so does the lavendar - it may help with the soothing also.

Maybe look at putting some Paw Paw cream on his bottom also - but then again that may not be strong enough.

Goodluck - hope he feels better real soon