3 large dogs crap and pee all over my patio every single day. it NEEDS to be hosed down every day. It will be disgusting otherwise and i suspect the smell will not please next door

We have a water butt, capture enough to keep the pond filled to a required level and to keep the plants etc growning nicely...

Probably not going to bother growing any veggies this year if I cant water them but thats about it.
3 large dogs crap and pee all over my patio every single day. it NEEDS to be hosed down every day. It will be disgusting otherwise and i suspect the smell will not please next door